aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/tools/python3/Lib/enum.py
blob: af5613838d12a914519be674c92da82e1b468c61 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
import sys
import builtins as bltns
from types import MappingProxyType, DynamicClassAttribute
from operator import or_ as _or_
from functools import reduce


__all__ = [
        'EnumType', 'EnumMeta',
        'Enum', 'IntEnum', 'StrEnum', 'Flag', 'IntFlag', 'ReprEnum',
        'auto', 'unique', 'property', 'verify', 'member', 'nonmember',
        'FlagBoundary', 'STRICT', 'CONFORM', 'EJECT', 'KEEP',
        'global_flag_repr', 'global_enum_repr', 'global_str', 'global_enum',
        'EnumCheck', 'CONTINUOUS', 'NAMED_FLAGS', 'UNIQUE',
        'pickle_by_global_name', 'pickle_by_enum_name',
        ]


# Dummy value for Enum and Flag as there are explicit checks for them
# before they have been created.
# This is also why there are checks in EnumType like `if Enum is not None`
Enum = Flag = EJECT = _stdlib_enums = ReprEnum = None

class nonmember(object):
    """
    Protects item from becoming an Enum member during class creation.
    """
    def __init__(self, value):
        self.value = value

class member(object):
    """
    Forces item to become an Enum member during class creation.
    """
    def __init__(self, value):
        self.value = value

def _is_descriptor(obj):
    """
    Returns True if obj is a descriptor, False otherwise.
    """
    return (
            hasattr(obj, '__get__') or
            hasattr(obj, '__set__') or
            hasattr(obj, '__delete__')
            )

def _is_dunder(name):
    """
    Returns True if a __dunder__ name, False otherwise.
    """
    return (
            len(name) > 4 and
            name[:2] == name[-2:] == '__' and
            name[2] != '_' and
            name[-3] != '_'
            )

def _is_sunder(name):
    """
    Returns True if a _sunder_ name, False otherwise.
    """
    return (
            len(name) > 2 and
            name[0] == name[-1] == '_' and
            name[1:2] != '_' and
            name[-2:-1] != '_'
            )

def _is_internal_class(cls_name, obj):
    # do not use `re` as `re` imports `enum`
    if not isinstance(obj, type):
        return False
    qualname = getattr(obj, '__qualname__', '')
    s_pattern = cls_name + '.' + getattr(obj, '__name__', '')
    e_pattern = '.' + s_pattern
    return qualname == s_pattern or qualname.endswith(e_pattern)

def _is_private(cls_name, name):
    # do not use `re` as `re` imports `enum`
    pattern = '_%s__' % (cls_name, )
    pat_len = len(pattern)
    if (
            len(name) > pat_len
            and name.startswith(pattern)
            and name[pat_len:pat_len+1] != ['_']
            and (name[-1] != '_' or name[-2] != '_')
        ):
        return True
    else:
        return False

def _is_single_bit(num):
    """
    True if only one bit set in num (should be an int)
    """
    if num == 0:
        return False
    num &= num - 1
    return num == 0

def _make_class_unpicklable(obj):
    """
    Make the given obj un-picklable.

    obj should be either a dictionary, or an Enum
    """
    def _break_on_call_reduce(self, proto):
        raise TypeError('%r cannot be pickled' % self)
    if isinstance(obj, dict):
        obj['__reduce_ex__'] = _break_on_call_reduce
        obj['__module__'] = '<unknown>'
    else:
        setattr(obj, '__reduce_ex__', _break_on_call_reduce)
        setattr(obj, '__module__', '<unknown>')

def _iter_bits_lsb(num):
    # num must be a positive integer
    original = num
    if isinstance(num, Enum):
        num = num.value
    if num < 0:
        raise ValueError('%r is not a positive integer' % original)
    while num:
        b = num & (~num + 1)
        yield b
        num ^= b

def show_flag_values(value):
    return list(_iter_bits_lsb(value))

def bin(num, max_bits=None):
    """
    Like built-in bin(), except negative values are represented in
    twos-compliment, and the leading bit always indicates sign
    (0=positive, 1=negative).

    >>> bin(10)
    '0b0 1010'
    >>> bin(~10)   # ~10 is -11
    '0b1 0101'
    """

    ceiling = 2 ** (num).bit_length()
    if num >= 0:
        s = bltns.bin(num + ceiling).replace('1', '0', 1)
    else:
        s = bltns.bin(~num ^ (ceiling - 1) + ceiling)
    sign = s[:3]
    digits = s[3:]
    if max_bits is not None:
        if len(digits) < max_bits:
            digits = (sign[-1] * max_bits + digits)[-max_bits:]
    return "%s %s" % (sign, digits)

def _dedent(text):
    """
    Like textwrap.dedent.  Rewritten because we cannot import textwrap.
    """
    lines = text.split('\n')
    blanks = 0
    for i, ch in enumerate(lines[0]):
        if ch != ' ':
            break
    for j, l in enumerate(lines):
        lines[j] = l[i:]
    return '\n'.join(lines)

class _not_given:
    def __repr__(self):
        return('<not given>')
_not_given = _not_given()

class _auto_null:
    def __repr__(self):
        return '_auto_null'
_auto_null = _auto_null()

class auto:
    """
    Instances are replaced with an appropriate value in Enum class suites.
    """
    def __init__(self, value=_auto_null):
        self.value = value

    def __repr__(self):
        return "auto(%r)" % self.value

class property(DynamicClassAttribute):
    """
    This is a descriptor, used to define attributes that act differently
    when accessed through an enum member and through an enum class.
    Instance access is the same as property(), but access to an attribute
    through the enum class will instead look in the class' _member_map_ for
    a corresponding enum member.
    """

    member = None
    _attr_type = None
    _cls_type = None

    def __get__(self, instance, ownerclass=None):
        if instance is None:
            if self.member is not None:
                return self.member
            else:
                raise AttributeError(
                        '%r has no attribute %r' % (ownerclass, self.name)
                        )
        if self.fget is not None:
            # use previous enum.property
            return self.fget(instance)
        elif self._attr_type == 'attr':
            # look up previous attibute
            return getattr(self._cls_type, self.name)
        elif self._attr_type == 'desc':
            # use previous descriptor
            return getattr(instance._value_, self.name)
        # look for a member by this name.
        try:
            return ownerclass._member_map_[self.name]
        except KeyError:
            raise AttributeError(
                    '%r has no attribute %r' % (ownerclass, self.name)
                    ) from None

    def __set__(self, instance, value):
        if self.fset is not None:
            return self.fset(instance, value)
        raise AttributeError(
                "<enum %r> cannot set attribute %r" % (self.clsname, self.name)
                )

    def __delete__(self, instance):
        if self.fdel is not None:
            return self.fdel(instance)
        raise AttributeError(
                "<enum %r> cannot delete attribute %r" % (self.clsname, self.name)
                )

    def __set_name__(self, ownerclass, name):
        self.name = name
        self.clsname = ownerclass.__name__


class _proto_member:
    """
    intermediate step for enum members between class execution and final creation
    """

    def __init__(self, value):
        self.value = value

    def __set_name__(self, enum_class, member_name):
        """
        convert each quasi-member into an instance of the new enum class
        """
        # first step: remove ourself from enum_class
        delattr(enum_class, member_name)
        # second step: create member based on enum_class
        value = self.value
        if not isinstance(value, tuple):
            args = (value, )
        else:
            args = value
        if enum_class._member_type_ is tuple:   # special case for tuple enums
            args = (args, )     # wrap it one more time
        if not enum_class._use_args_:
            enum_member = enum_class._new_member_(enum_class)
        else:
            enum_member = enum_class._new_member_(enum_class, *args)
        if not hasattr(enum_member, '_value_'):
            if enum_class._member_type_ is object:
                enum_member._value_ = value
            else:
                try:
                    enum_member._value_ = enum_class._member_type_(*args)
                except Exception as exc:
                    new_exc = TypeError(
                            '_value_ not set in __new__, unable to create it'
                            )
                    new_exc.__cause__ = exc
                    raise new_exc
        value = enum_member._value_
        enum_member._name_ = member_name
        enum_member.__objclass__ = enum_class
        enum_member.__init__(*args)
        enum_member._sort_order_ = len(enum_class._member_names_)

        if Flag is not None and issubclass(enum_class, Flag):
            if isinstance(value, int):
                enum_class._flag_mask_ |= value
                if _is_single_bit(value):
                    enum_class._singles_mask_ |= value
            enum_class._all_bits_ = 2 ** ((enum_class._flag_mask_).bit_length()) - 1

        # If another member with the same value was already defined, the
        # new member becomes an alias to the existing one.
        try:
            try:
                # try to do a fast lookup to avoid the quadratic loop
                enum_member = enum_class._value2member_map_[value]
            except TypeError:
                for name, canonical_member in enum_class._member_map_.items():
                    if canonical_member._value_ == value:
                        enum_member = canonical_member
                        break
                else:
                    raise KeyError
        except KeyError:
            # this could still be an alias if the value is multi-bit and the
            # class is a flag class
            if (
                    Flag is None
                    or not issubclass(enum_class, Flag)
                ):
                # no other instances found, record this member in _member_names_
                enum_class._member_names_.append(member_name)
            elif (
                    Flag is not None
                    and issubclass(enum_class, Flag)
                    and isinstance(value, int)
                    and _is_single_bit(value)
                ):
                # no other instances found, record this member in _member_names_
                enum_class._member_names_.append(member_name)
        # if necessary, get redirect in place and then add it to _member_map_
        found_descriptor = None
        descriptor_type = None
        class_type = None
        for base in enum_class.__mro__[1:]:
            attr = base.__dict__.get(member_name)
            if attr is not None:
                if isinstance(attr, (property, DynamicClassAttribute)):
                    found_descriptor = attr
                    class_type = base
                    descriptor_type = 'enum'
                    break
                elif _is_descriptor(attr):
                    found_descriptor = attr
                    descriptor_type = descriptor_type or 'desc'
                    class_type = class_type or base
                    continue
                else:
                    descriptor_type = 'attr'
                    class_type = base
        if found_descriptor:
            redirect = property()
            redirect.member = enum_member
            redirect.__set_name__(enum_class, member_name)
            if descriptor_type in ('enum','desc'):
                # earlier descriptor found; copy fget, fset, fdel to this one.
                redirect.fget = getattr(found_descriptor, 'fget', None)
                redirect._get = getattr(found_descriptor, '__get__', None)
                redirect.fset = getattr(found_descriptor, 'fset', None)
                redirect._set = getattr(found_descriptor, '__set__', None)
                redirect.fdel = getattr(found_descriptor, 'fdel', None)
                redirect._del = getattr(found_descriptor, '__delete__', None)
            redirect._attr_type = descriptor_type
            redirect._cls_type = class_type
            setattr(enum_class, member_name, redirect)
        else:
            setattr(enum_class, member_name, enum_member)
        # now add to _member_map_ (even aliases)
        enum_class._member_map_[member_name] = enum_member
        try:
            # This may fail if value is not hashable. We can't add the value
            # to the map, and by-value lookups for this value will be
            # linear.
            enum_class._value2member_map_.setdefault(value, enum_member)
        except TypeError:
            # keep track of the value in a list so containment checks are quick
            enum_class._unhashable_values_.append(value)


class _EnumDict(dict):
    """
    Track enum member order and ensure member names are not reused.

    EnumType will use the names found in self._member_names as the
    enumeration member names.
    """
    def __init__(self):
        super().__init__()
        self._member_names = {} # use a dict to keep insertion order
        self._last_values = []
        self._ignore = []
        self._auto_called = False

    def __setitem__(self, key, value):
        """
        Changes anything not dundered or not a descriptor.

        If an enum member name is used twice, an error is raised; duplicate
        values are not checked for.

        Single underscore (sunder) names are reserved.
        """
        if _is_internal_class(self._cls_name, value):
            import warnings
            warnings.warn(
                    "In 3.13 classes created inside an enum will not become a member.  "
                    "Use the `member` decorator to keep the current behavior.",
                    DeprecationWarning,
                    stacklevel=2,
                    )
        if _is_private(self._cls_name, key):
            # also do nothing, name will be a normal attribute
            pass
        elif _is_sunder(key):
            if key not in (
                    '_order_',
                    '_generate_next_value_', '_numeric_repr_', '_missing_', '_ignore_',
                    '_iter_member_', '_iter_member_by_value_', '_iter_member_by_def_',
                    ):
                raise ValueError(
                        '_sunder_ names, such as %r, are reserved for future Enum use'
                        % (key, )
                        )
            if key == '_generate_next_value_':
                # check if members already defined as auto()
                if self._auto_called:
                    raise TypeError("_generate_next_value_ must be defined before members")
                _gnv = value.__func__ if isinstance(value, staticmethod) else value
                setattr(self, '_generate_next_value', _gnv)
            elif key == '_ignore_':
                if isinstance(value, str):
                    value = value.replace(',',' ').split()
                else:
                    value = list(value)
                self._ignore = value
                already = set(value) & set(self._member_names)
                if already:
                    raise ValueError(
                            '_ignore_ cannot specify already set names: %r'
                            % (already, )
                            )
        elif _is_dunder(key):
            if key == '__order__':
                key = '_order_'
        elif key in self._member_names:
            # descriptor overwriting an enum?
            raise TypeError('%r already defined as %r' % (key, self[key]))
        elif key in self._ignore:
            pass
        elif isinstance(value, nonmember):
            # unwrap value here; it won't be processed by the below `else`
            value = value.value
        elif _is_descriptor(value):
            pass
        # TODO: uncomment next three lines in 3.13
        # elif _is_internal_class(self._cls_name, value):
        #     # do nothing, name will be a normal attribute
        #     pass
        else:
            if key in self:
                # enum overwriting a descriptor?
                raise TypeError('%r already defined as %r' % (key, self[key]))
            elif isinstance(value, member):
                # unwrap value here -- it will become a member
                value = value.value
            non_auto_store = True
            single = False
            if isinstance(value, auto):
                single = True
                value = (value, )
            if isinstance(value, tuple) and any(isinstance(v, auto) for v in value):
                # insist on an actual tuple, no subclasses, in keeping with only supporting
                # top-level auto() usage (not contained in any other data structure)
                auto_valued = []
                t = type(value)
                for v in value:
                    if isinstance(v, auto):
                        non_auto_store = False
                        if v.value == _auto_null:
                            v.value = self._generate_next_value(
                                    key, 1, len(self._member_names), self._last_values[:],
                                    )
                            self._auto_called = True
                        v = v.value
                        self._last_values.append(v)
                    auto_valued.append(v)
                if single:
                    value = auto_valued[0]
                else:
                    try:
                        # accepts iterable as multiple arguments?
                        value = t(auto_valued)
                    except TypeError:
                        # then pass them in singlely
                        value = t(*auto_valued)
            self._member_names[key] = None
            if non_auto_store:
                self._last_values.append(value)
        super().__setitem__(key, value)

    def update(self, members, **more_members):
        try:
            for name in members.keys():
                self[name] = members[name]
        except AttributeError:
            for name, value in members:
                self[name] = value
        for name, value in more_members.items():
            self[name] = value


class EnumType(type):
    """
    Metaclass for Enum
    """

    @classmethod
    def __prepare__(metacls, cls, bases, **kwds):
        # check that previous enum members do not exist
        metacls._check_for_existing_members_(cls, bases)
        # create the namespace dict
        enum_dict = _EnumDict()
        enum_dict._cls_name = cls
        # inherit previous flags and _generate_next_value_ function
        member_type, first_enum = metacls._get_mixins_(cls, bases)
        if first_enum is not None:
            enum_dict['_generate_next_value_'] = getattr(
                    first_enum, '_generate_next_value_', None,
                    )
        return enum_dict

    def __new__(metacls, cls, bases, classdict, *, boundary=None, _simple=False, **kwds):
        # an Enum class is final once enumeration items have been defined; it
        # cannot be mixed with other types (int, float, etc.) if it has an
        # inherited __new__ unless a new __new__ is defined (or the resulting
        # class will fail).
        #
        if _simple:
            return super().__new__(metacls, cls, bases, classdict, **kwds)
        #
        # remove any keys listed in _ignore_
        classdict.setdefault('_ignore_', []).append('_ignore_')
        ignore = classdict['_ignore_']
        for key in ignore:
            classdict.pop(key, None)
        #
        # grab member names
        member_names = classdict._member_names
        #
        # check for illegal enum names (any others?)
        invalid_names = set(member_names) & {'mro', ''}
        if invalid_names:
            raise ValueError('invalid enum member name(s) %s'  % (
                    ','.join(repr(n) for n in invalid_names)
                    ))
        #
        # adjust the sunders
        _order_ = classdict.pop('_order_', None)
        _gnv = classdict.get('_generate_next_value_')
        if _gnv is not None and type(_gnv) is not staticmethod:
            _gnv = staticmethod(_gnv)
        # convert to normal dict
        classdict = dict(classdict.items())
        if _gnv is not None:
            classdict['_generate_next_value_'] = _gnv
        #
        # data type of member and the controlling Enum class
        member_type, first_enum = metacls._get_mixins_(cls, bases)
        __new__, save_new, use_args = metacls._find_new_(
                classdict, member_type, first_enum,
                )
        classdict['_new_member_'] = __new__
        classdict['_use_args_'] = use_args
        #
        # convert future enum members into temporary _proto_members
        for name in member_names:
            value = classdict[name]
            classdict[name] = _proto_member(value)
        #
        # house-keeping structures
        classdict['_member_names_'] = []
        classdict['_member_map_'] = {}
        classdict['_value2member_map_'] = {}
        classdict['_unhashable_values_'] = []
        classdict['_member_type_'] = member_type
        # now set the __repr__ for the value
        classdict['_value_repr_'] = metacls._find_data_repr_(cls, bases)
        #
        # Flag structures (will be removed if final class is not a Flag
        classdict['_boundary_'] = (
                boundary
                or getattr(first_enum, '_boundary_', None)
                )
        classdict['_flag_mask_'] = 0
        classdict['_singles_mask_'] = 0
        classdict['_all_bits_'] = 0
        classdict['_inverted_'] = None
        try:
            exc = None
            enum_class = super().__new__(metacls, cls, bases, classdict, **kwds)
        except Exception as e:
            # since 3.12 the line "Error calling __set_name__ on '_proto_member' instance ..."
            # is tacked on to the error instead of raising a RuntimeError
            # recreate the exception to discard
            exc = type(e)(str(e))
            exc.__cause__ = e.__cause__
            exc.__context__ = e.__context__
            tb = e.__traceback__
        if exc is not None:
            raise exc.with_traceback(tb)
        #
        # update classdict with any changes made by __init_subclass__
        classdict.update(enum_class.__dict__)
        #
        # double check that repr and friends are not the mixin's or various
        # things break (such as pickle)
        # however, if the method is defined in the Enum itself, don't replace
        # it
        #
        # Also, special handling for ReprEnum
        if ReprEnum is not None and ReprEnum in bases:
            if member_type is object:
                raise TypeError(
                        'ReprEnum subclasses must be mixed with a data type (i.e.'
                        ' int, str, float, etc.)'
                        )
            if '__format__' not in classdict:
                enum_class.__format__ = member_type.__format__
                classdict['__format__'] = enum_class.__format__
            if '__str__' not in classdict:
                method = member_type.__str__
                if method is object.__str__:
                    # if member_type does not define __str__, object.__str__ will use
                    # its __repr__ instead, so we'll also use its __repr__
                    method = member_type.__repr__
                enum_class.__str__ = method
                classdict['__str__'] = enum_class.__str__
        for name in ('__repr__', '__str__', '__format__', '__reduce_ex__'):
            if name not in classdict:
                # check for mixin overrides before replacing
                enum_method = getattr(first_enum, name)
                found_method = getattr(enum_class, name)
                object_method = getattr(object, name)
                data_type_method = getattr(member_type, name)
                if found_method in (data_type_method, object_method):
                    setattr(enum_class, name, enum_method)
        #
        # for Flag, add __or__, __and__, __xor__, and __invert__
        if Flag is not None and issubclass(enum_class, Flag):
            for name in (
                    '__or__', '__and__', '__xor__',
                    '__ror__', '__rand__', '__rxor__',
                    '__invert__'
                ):
                if name not in classdict:
                    enum_method = getattr(Flag, name)
                    setattr(enum_class, name, enum_method)
                    classdict[name] = enum_method
        #
        # replace any other __new__ with our own (as long as Enum is not None,
        # anyway) -- again, this is to support pickle
        if Enum is not None:
            # if the user defined their own __new__, save it before it gets
            # clobbered in case they subclass later
            if save_new:
                enum_class.__new_member__ = __new__
            enum_class.__new__ = Enum.__new__
        #
        # py3 support for definition order (helps keep py2/py3 code in sync)
        #
        # _order_ checking is spread out into three/four steps
        # - if enum_class is a Flag:
        #   - remove any non-single-bit flags from _order_
        # - remove any aliases from _order_
        # - check that _order_ and _member_names_ match
        #
        # step 1: ensure we have a list
        if _order_ is not None:
            if isinstance(_order_, str):
                _order_ = _order_.replace(',', ' ').split()
        #
        # remove Flag structures if final class is not a Flag
        if (
                Flag is None and cls != 'Flag'
                or Flag is not None and not issubclass(enum_class, Flag)
            ):
            delattr(enum_class, '_boundary_')
            delattr(enum_class, '_flag_mask_')
            delattr(enum_class, '_singles_mask_')
            delattr(enum_class, '_all_bits_')
            delattr(enum_class, '_inverted_')
        elif Flag is not None and issubclass(enum_class, Flag):
            # set correct __iter__
            member_list = [m._value_ for m in enum_class]
            if member_list != sorted(member_list):
                enum_class._iter_member_ = enum_class._iter_member_by_def_
            if _order_:
                # _order_ step 2: remove any items from _order_ that are not single-bit
                _order_ = [
                        o
                        for o in _order_
                        if o not in enum_class._member_map_ or _is_single_bit(enum_class[o]._value_)
                        ]
        #
        if _order_:
            # _order_ step 3: remove aliases from _order_
            _order_ = [
                    o
                    for o in _order_
                    if (
                        o not in enum_class._member_map_
                        or
                        (o in enum_class._member_map_ and o in enum_class._member_names_)
                        )]
            # _order_ step 4: verify that _order_ and _member_names_ match
            if _order_ != enum_class._member_names_:
                raise TypeError(
                        'member order does not match _order_:\n  %r\n  %r'
                        % (enum_class._member_names_, _order_)
                        )
        #
        return enum_class

    def __bool__(cls):
        """
        classes/types should always be True.
        """
        return True

    def __call__(cls, value, names=_not_given, *values, module=None, qualname=None, type=None, start=1, boundary=None):
        """
        Either returns an existing member, or creates a new enum class.

        This method is used both when an enum class is given a value to match
        to an enumeration member (i.e. Color(3)) and for the functional API
        (i.e. Color = Enum('Color', names='RED GREEN BLUE')).

        The value lookup branch is chosen if the enum is final.

        When used for the functional API:

        `value` will be the name of the new class.

        `names` should be either a string of white-space/comma delimited names
        (values will start at `start`), or an iterator/mapping of name, value pairs.

        `module` should be set to the module this class is being created in;
        if it is not set, an attempt to find that module will be made, but if
        it fails the class will not be picklable.

        `qualname` should be set to the actual location this class can be found
        at in its module; by default it is set to the global scope.  If this is
        not correct, unpickling will fail in some circumstances.

        `type`, if set, will be mixed in as the first base class.
        """
        if cls._member_map_:
            # simple value lookup if members exist
            if names is not _not_given:
                value = (value, names) + values
            return cls.__new__(cls, value)
        # otherwise, functional API: we're creating a new Enum type
        if names is _not_given and type is None:
            # no body? no data-type? possibly wrong usage
            raise TypeError(
                    f"{cls} has no members; specify `names=()` if you meant to create a new, empty, enum"
                    )
        return cls._create_(
                class_name=value,
                names=None if names is _not_given else names,
                module=module,
                qualname=qualname,
                type=type,
                start=start,
                boundary=boundary,
                )

    def __contains__(cls, value):
        """Return True if `value` is in `cls`.

        `value` is in `cls` if:
        1) `value` is a member of `cls`, or
        2) `value` is the value of one of the `cls`'s members.
        """
        if isinstance(value, cls):
            return True
        return value in cls._value2member_map_ or value in cls._unhashable_values_

    def __delattr__(cls, attr):
        # nicer error message when someone tries to delete an attribute
        # (see issue19025).
        if attr in cls._member_map_:
            raise AttributeError("%r cannot delete member %r." % (cls.__name__, attr))
        super().__delattr__(attr)

    def __dir__(cls):
        interesting = set([
                '__class__', '__contains__', '__doc__', '__getitem__',
                '__iter__', '__len__', '__members__', '__module__',
                '__name__', '__qualname__',
                ]
                + cls._member_names_
                )
        if cls._new_member_ is not object.__new__:
            interesting.add('__new__')
        if cls.__init_subclass__ is not object.__init_subclass__:
            interesting.add('__init_subclass__')
        if cls._member_type_ is object:
            return sorted(interesting)
        else:
            # return whatever mixed-in data type has
            return sorted(set(dir(cls._member_type_)) | interesting)

    def __getitem__(cls, name):
        """
        Return the member matching `name`.
        """
        return cls._member_map_[name]

    def __iter__(cls):
        """
        Return members in definition order.
        """
        return (cls._member_map_[name] for name in cls._member_names_)

    def __len__(cls):
        """
        Return the number of members (no aliases)
        """
        return len(cls._member_names_)

    @bltns.property
    def __members__(cls):
        """
        Returns a mapping of member name->value.

        This mapping lists all enum members, including aliases. Note that this
        is a read-only view of the internal mapping.
        """
        return MappingProxyType(cls._member_map_)

    def __repr__(cls):
        if Flag is not None and issubclass(cls, Flag):
            return "<flag %r>" % cls.__name__
        else:
            return "<enum %r>" % cls.__name__

    def __reversed__(cls):
        """
        Return members in reverse definition order.
        """
        return (cls._member_map_[name] for name in reversed(cls._member_names_))

    def __setattr__(cls, name, value):
        """
        Block attempts to reassign Enum members.

        A simple assignment to the class namespace only changes one of the
        several possible ways to get an Enum member from the Enum class,
        resulting in an inconsistent Enumeration.
        """
        member_map = cls.__dict__.get('_member_map_', {})
        if name in member_map:
            raise AttributeError('cannot reassign member %r' % (name, ))
        super().__setattr__(name, value)

    def _create_(cls, class_name, names, *, module=None, qualname=None, type=None, start=1, boundary=None):
        """
        Convenience method to create a new Enum class.

        `names` can be:

        * A string containing member names, separated either with spaces or
          commas.  Values are incremented by 1 from `start`.
        * An iterable of member names.  Values are incremented by 1 from `start`.
        * An iterable of (member name, value) pairs.
        * A mapping of member name -> value pairs.
        """
        metacls = cls.__class__
        bases = (cls, ) if type is None else (type, cls)
        _, first_enum = cls._get_mixins_(class_name, bases)
        classdict = metacls.__prepare__(class_name, bases)

        # special processing needed for names?
        if isinstance(names, str):
            names = names.replace(',', ' ').split()
        if isinstance(names, (tuple, list)) and names and isinstance(names[0], str):
            original_names, names = names, []
            last_values = []
            for count, name in enumerate(original_names):
                value = first_enum._generate_next_value_(name, start, count, last_values[:])
                last_values.append(value)
                names.append((name, value))
        if names is None:
            names = ()

        # Here, names is either an iterable of (name, value) or a mapping.
        for item in names:
            if isinstance(item, str):
                member_name, member_value = item, names[item]
            else:
                member_name, member_value = item
            classdict[member_name] = member_value

        if module is None:
            try:
                module = sys._getframemodulename(2)
            except AttributeError:
                # Fall back on _getframe if _getframemodulename is missing
                try:
                    module = sys._getframe(2).f_globals['__name__']
                except (AttributeError, ValueError, KeyError):
                    pass
        if module is None:
            _make_class_unpicklable(classdict)
        else:
            classdict['__module__'] = module
        if qualname is not None:
            classdict['__qualname__'] = qualname

        return metacls.__new__(metacls, class_name, bases, classdict, boundary=boundary)

    def _convert_(cls, name, module, filter, source=None, *, boundary=None, as_global=False):
        """
        Create a new Enum subclass that replaces a collection of global constants
        """
        # convert all constants from source (or module) that pass filter() to
        # a new Enum called name, and export the enum and its members back to
        # module;
        # also, replace the __reduce_ex__ method so unpickling works in
        # previous Python versions
        module_globals = sys.modules[module].__dict__
        if source:
            source = source.__dict__
        else:
            source = module_globals
        # _value2member_map_ is populated in the same order every time
        # for a consistent reverse mapping of number to name when there
        # are multiple names for the same number.
        members = [
                (name, value)
                for name, value in source.items()
                if filter(name)]
        try:
            # sort by value
            members.sort(key=lambda t: (t[1], t[0]))
        except TypeError:
            # unless some values aren't comparable, in which case sort by name
            members.sort(key=lambda t: t[0])
        body = {t[0]: t[1] for t in members}
        body['__module__'] = module
        tmp_cls = type(name, (object, ), body)
        cls = _simple_enum(etype=cls, boundary=boundary or KEEP)(tmp_cls)
        if as_global:
            global_enum(cls)
        else:
            sys.modules[cls.__module__].__dict__.update(cls.__members__)
        module_globals[name] = cls
        return cls

    @classmethod
    def _check_for_existing_members_(mcls, class_name, bases):
        for chain in bases:
            for base in chain.__mro__:
                if isinstance(base, EnumType) and base._member_names_:
                    raise TypeError(
                            "<enum %r> cannot extend %r"
                            % (class_name, base)
                            )

    @classmethod
    def _get_mixins_(mcls, class_name, bases):
        """
        Returns the type for creating enum members, and the first inherited
        enum class.

        bases: the tuple of bases that was given to __new__
        """
        if not bases:
            return object, Enum
        # ensure final parent class is an Enum derivative, find any concrete
        # data type, and check that Enum has no members
        first_enum = bases[-1]
        if not isinstance(first_enum, EnumType):
            raise TypeError("new enumerations should be created as "
                    "`EnumName([mixin_type, ...] [data_type,] enum_type)`")
        member_type = mcls._find_data_type_(class_name, bases) or object
        return member_type, first_enum

    @classmethod
    def _find_data_repr_(mcls, class_name, bases):
        for chain in bases:
            for base in chain.__mro__:
                if base is object:
                    continue
                elif isinstance(base, EnumType):
                    # if we hit an Enum, use it's _value_repr_
                    return base._value_repr_
                elif '__repr__' in base.__dict__:
                    # this is our data repr
                    # double-check if a dataclass with a default __repr__
                    if (
                            '__dataclass_fields__' in base.__dict__
                            and '__dataclass_params__' in base.__dict__
                            and base.__dict__['__dataclass_params__'].repr
                        ):
                        return _dataclass_repr
                    else:
                        return base.__dict__['__repr__']
        return None

    @classmethod
    def _find_data_type_(mcls, class_name, bases):
        # a datatype has a __new__ method, or a __dataclass_fields__ attribute
        data_types = set()
        base_chain = set()
        for chain in bases:
            candidate = None
            for base in chain.__mro__:
                base_chain.add(base)
                if base is object:
                    continue
                elif isinstance(base, EnumType):
                    if base._member_type_ is not object:
                        data_types.add(base._member_type_)
                        break
                elif '__new__' in base.__dict__ or '__dataclass_fields__' in base.__dict__:
                    data_types.add(candidate or base)
                    break
                else:
                    candidate = candidate or base
        if len(data_types) > 1:
            raise TypeError('too many data types for %r: %r' % (class_name, data_types))
        elif data_types:
            return data_types.pop()
        else:
            return None

    @classmethod
    def _find_new_(mcls, classdict, member_type, first_enum):
        """
        Returns the __new__ to be used for creating the enum members.

        classdict: the class dictionary given to __new__
        member_type: the data type whose __new__ will be used by default
        first_enum: enumeration to check for an overriding __new__
        """
        # now find the correct __new__, checking to see of one was defined
        # by the user; also check earlier enum classes in case a __new__ was
        # saved as __new_member__
        __new__ = classdict.get('__new__', None)

        # should __new__ be saved as __new_member__ later?
        save_new = first_enum is not None and __new__ is not None

        if __new__ is None:
            # check all possibles for __new_member__ before falling back to
            # __new__
            for method in ('__new_member__', '__new__'):
                for possible in (member_type, first_enum):
                    target = getattr(possible, method, None)
                    if target not in {
                            None,
                            None.__new__,
                            object.__new__,
                            Enum.__new__,
                            }:
                        __new__ = target
                        break
                if __new__ is not None:
                    break
            else:
                __new__ = object.__new__

        # if a non-object.__new__ is used then whatever value/tuple was
        # assigned to the enum member name will be passed to __new__ and to the
        # new enum member's __init__
        if first_enum is None or __new__ in (Enum.__new__, object.__new__):
            use_args = False
        else:
            use_args = True
        return __new__, save_new, use_args
EnumMeta = EnumType


class Enum(metaclass=EnumType):
    """
    Create a collection of name/value pairs.

    Example enumeration:

    >>> class Color(Enum):
    ...     RED = 1
    ...     BLUE = 2
    ...     GREEN = 3

    Access them by:

    - attribute access:

      >>> Color.RED
      <Color.RED: 1>

    - value lookup:

      >>> Color(1)
      <Color.RED: 1>

    - name lookup:

      >>> Color['RED']
      <Color.RED: 1>

    Enumerations can be iterated over, and know how many members they have:

    >>> len(Color)
    3

    >>> list(Color)
    [<Color.RED: 1>, <Color.BLUE: 2>, <Color.GREEN: 3>]

    Methods can be added to enumerations, and members can have their own
    attributes -- see the documentation for details.
    """

    @classmethod
    def __signature__(cls):
        if cls._member_names_:
            return '(*values)'
        else:
            return '(new_class_name, /, names, *, module=None, qualname=None, type=None, start=1, boundary=None)'

    def __new__(cls, value):
        # all enum instances are actually created during class construction
        # without calling this method; this method is called by the metaclass'
        # __call__ (i.e. Color(3) ), and by pickle
        if type(value) is cls:
            # For lookups like Color(Color.RED)
            return value
        # by-value search for a matching enum member
        # see if it's in the reverse mapping (for hashable values)
        try:
            return cls._value2member_map_[value]
        except KeyError:
            # Not found, no need to do long O(n) search
            pass
        except TypeError:
            # not there, now do long search -- O(n) behavior
            for member in cls._member_map_.values():
                if member._value_ == value:
                    return member
        # still not found -- verify that members exist, in-case somebody got here mistakenly
        # (such as via super when trying to override __new__)
        if not cls._member_map_:
            raise TypeError("%r has no members defined" % cls)
        #
        # still not found -- try _missing_ hook
        try:
            exc = None
            result = cls._missing_(value)
        except Exception as e:
            exc = e
            result = None
        try:
            if isinstance(result, cls):
                return result
            elif (
                    Flag is not None and issubclass(cls, Flag)
                    and cls._boundary_ is EJECT and isinstance(result, int)
                ):
                return result
            else:
                ve_exc = ValueError("%r is not a valid %s" % (value, cls.__qualname__))
                if result is None and exc is None:
                    raise ve_exc
                elif exc is None:
                    exc = TypeError(
                            'error in %s._missing_: returned %r instead of None or a valid member'
                            % (cls.__name__, result)
                            )
                if not isinstance(exc, ValueError):
                    exc.__context__ = ve_exc
                raise exc
        finally:
            # ensure all variables that could hold an exception are destroyed
            exc = None
            ve_exc = None

    def __init__(self, *args, **kwds):
        pass

    @staticmethod
    def _generate_next_value_(name, start, count, last_values):
        """
        Generate the next value when not given.

        name: the name of the member
        start: the initial start value or None
        count: the number of existing members
        last_values: the list of values assigned
        """
        if not last_values:
            return start
        try:
            last = last_values[-1]
            last_values.sort()
            if last == last_values[-1]:
                # no difference between old and new methods
                return last + 1
            else:
                # trigger old method (with warning)
                raise TypeError
        except TypeError:
            import warnings
            warnings.warn(
                    "In 3.13 the default `auto()`/`_generate_next_value_` will require all values to be sortable and support adding +1\n"
                    "and the value returned will be the largest value in the enum incremented by 1",
                    DeprecationWarning,
                    stacklevel=3,
                    )
            for v in reversed(last_values):
                try:
                    return v + 1
                except TypeError:
                    pass
            return start

    @classmethod
    def _missing_(cls, value):
        return None

    def __repr__(self):
        v_repr = self.__class__._value_repr_ or repr
        return "<%s.%s: %s>" % (self.__class__.__name__, self._name_, v_repr(self._value_))

    def __str__(self):
        return "%s.%s" % (self.__class__.__name__, self._name_, )

    def __dir__(self):
        """
        Returns public methods and other interesting attributes.
        """
        interesting = set()
        if self.__class__._member_type_ is not object:
            interesting = set(object.__dir__(self))
        for name in getattr(self, '__dict__', []):
            if name[0] != '_' and name not in self._member_map_:
                interesting.add(name)
        for cls in self.__class__.mro():
            for name, obj in cls.__dict__.items():
                if name[0] == '_':
                    continue
                if isinstance(obj, property):
                    # that's an enum.property
                    if obj.fget is not None or name not in self._member_map_:
                        interesting.add(name)
                    else:
                        # in case it was added by `dir(self)`
                        interesting.discard(name)
                elif name not in self._member_map_:
                    interesting.add(name)
        names = sorted(
                set(['__class__', '__doc__', '__eq__', '__hash__', '__module__'])
                | interesting
                )
        return names

    def __format__(self, format_spec):
        return str.__format__(str(self), format_spec)

    def __hash__(self):
        return hash(self._name_)

    def __reduce_ex__(self, proto):
        return self.__class__, (self._value_, )

    def __deepcopy__(self,memo):
        return self

    def __copy__(self):
        return self

    # enum.property is used to provide access to the `name` and
    # `value` attributes of enum members while keeping some measure of
    # protection from modification, while still allowing for an enumeration
    # to have members named `name` and `value`.  This works because each
    # instance of enum.property saves its companion member, which it returns
    # on class lookup; on instance lookup it either executes a provided function
    # or raises an AttributeError.

    @property
    def name(self):
        """The name of the Enum member."""
        return self._name_

    @property
    def value(self):
        """The value of the Enum member."""
        return self._value_


class ReprEnum(Enum):
    """
    Only changes the repr(), leaving str() and format() to the mixed-in type.
    """


class IntEnum(int, ReprEnum):
    """
    Enum where members are also (and must be) ints
    """


class StrEnum(str, ReprEnum):
    """
    Enum where members are also (and must be) strings
    """

    def __new__(cls, *values):
        "values must already be of type `str`"
        if len(values) > 3:
            raise TypeError('too many arguments for str(): %r' % (values, ))
        if len(values) == 1:
            # it must be a string
            if not isinstance(values[0], str):
                raise TypeError('%r is not a string' % (values[0], ))
        if len(values) >= 2:
            # check that encoding argument is a string
            if not isinstance(values[1], str):
                raise TypeError('encoding must be a string, not %r' % (values[1], ))
        if len(values) == 3:
            # check that errors argument is a string
            if not isinstance(values[2], str):
                raise TypeError('errors must be a string, not %r' % (values[2]))
        value = str(*values)
        member = str.__new__(cls, value)
        member._value_ = value
        return member

    @staticmethod
    def _generate_next_value_(name, start, count, last_values):
        """
        Return the lower-cased version of the member name.
        """
        return name.lower()


def pickle_by_global_name(self, proto):
    # should not be used with Flag-type enums
    return self.name
_reduce_ex_by_global_name = pickle_by_global_name

def pickle_by_enum_name(self, proto):
    # should not be used with Flag-type enums
    return getattr, (self.__class__, self._name_)

class FlagBoundary(StrEnum):
    """
    control how out of range values are handled
    "strict" -> error is raised             [default for Flag]
    "conform" -> extra bits are discarded
    "eject" -> lose flag status
    "keep" -> keep flag status and all bits [default for IntFlag]
    """
    STRICT = auto()
    CONFORM = auto()
    EJECT = auto()
    KEEP = auto()
STRICT, CONFORM, EJECT, KEEP = FlagBoundary


class Flag(Enum, boundary=STRICT):
    """
    Support for flags
    """

    _numeric_repr_ = repr

    @staticmethod
    def _generate_next_value_(name, start, count, last_values):
        """
        Generate the next value when not given.

        name: the name of the member
        start: the initial start value or None
        count: the number of existing members
        last_values: the last value assigned or None
        """
        if not count:
            return start if start is not None else 1
        last_value = max(last_values)
        try:
            high_bit = _high_bit(last_value)
        except Exception:
            raise TypeError('invalid flag value %r' % last_value) from None
        return 2 ** (high_bit+1)

    @classmethod
    def _iter_member_by_value_(cls, value):
        """
        Extract all members from the value in definition (i.e. increasing value) order.
        """
        for val in _iter_bits_lsb(value & cls._flag_mask_):
            yield cls._value2member_map_.get(val)

    _iter_member_ = _iter_member_by_value_

    @classmethod
    def _iter_member_by_def_(cls, value):
        """
        Extract all members from the value in definition order.
        """
        yield from sorted(
                cls._iter_member_by_value_(value),
                key=lambda m: m._sort_order_,
                )

    @classmethod
    def _missing_(cls, value):
        """
        Create a composite member containing all canonical members present in `value`.

        If non-member values are present, result depends on `_boundary_` setting.
        """
        if not isinstance(value, int):
            raise ValueError(
                    "%r is not a valid %s" % (value, cls.__qualname__)
                    )
        # check boundaries
        # - value must be in range (e.g. -16 <-> +15, i.e. ~15 <-> 15)
        # - value must not include any skipped flags (e.g. if bit 2 is not
        #   defined, then 0d10 is invalid)
        flag_mask = cls._flag_mask_
        singles_mask = cls._singles_mask_
        all_bits = cls._all_bits_
        neg_value = None
        if (
                not ~all_bits <= value <= all_bits
                or value & (all_bits ^ flag_mask)
            ):
            if cls._boundary_ is STRICT:
                max_bits = max(value.bit_length(), flag_mask.bit_length())
                raise ValueError(
                        "%r invalid value %r\n    given %s\n  allowed %s" % (
                            cls, value, bin(value, max_bits), bin(flag_mask, max_bits),
                            ))
            elif cls._boundary_ is CONFORM:
                value = value & flag_mask
            elif cls._boundary_ is EJECT:
                return value
            elif cls._boundary_ is KEEP:
                if value < 0:
                    value = (
                            max(all_bits+1, 2**(value.bit_length()))
                            + value
                            )
            else:
                raise ValueError(
                        '%r unknown flag boundary %r' % (cls, cls._boundary_, )
                        )
        if value < 0:
            neg_value = value
            value = all_bits + 1 + value
        # get members and unknown
        unknown = value & ~flag_mask
        aliases = value & ~singles_mask
        member_value = value & singles_mask
        if unknown and cls._boundary_ is not KEEP:
            raise ValueError(
                    '%s(%r) -->  unknown values %r [%s]'
                    % (cls.__name__, value, unknown, bin(unknown))
                    )
        # normal Flag?
        if cls._member_type_ is object:
            # construct a singleton enum pseudo-member
            pseudo_member = object.__new__(cls)
        else:
            pseudo_member = cls._member_type_.__new__(cls, value)
        if not hasattr(pseudo_member, '_value_'):
            pseudo_member._value_ = value
        if member_value or aliases:
            members = []
            combined_value = 0
            for m in cls._iter_member_(member_value):
                members.append(m)
                combined_value |= m._value_
            if aliases:
                value = member_value | aliases
                for n, pm in cls._member_map_.items():
                    if pm not in members and pm._value_ and pm._value_ & value == pm._value_:
                        members.append(pm)
                        combined_value |= pm._value_
            unknown = value ^ combined_value
            pseudo_member._name_ = '|'.join([m._name_ for m in members])
            if not combined_value:
                pseudo_member._name_ = None
            elif unknown and cls._boundary_ is STRICT:
                raise ValueError('%r: no members with value %r' % (cls, unknown))
            elif unknown:
                pseudo_member._name_ += '|%s' % cls._numeric_repr_(unknown)
        else:
            pseudo_member._name_ = None
        # use setdefault in case another thread already created a composite
        # with this value
        # note: zero is a special case -- always add it
        pseudo_member = cls._value2member_map_.setdefault(value, pseudo_member)
        if neg_value is not None:
            cls._value2member_map_[neg_value] = pseudo_member
        return pseudo_member

    def __contains__(self, other):
        """
        Returns True if self has at least the same flags set as other.
        """
        if not isinstance(other, self.__class__):
            raise TypeError(
                "unsupported operand type(s) for 'in': %r and %r" % (
                    type(other).__qualname__, self.__class__.__qualname__))
        return other._value_ & self._value_ == other._value_

    def __iter__(self):
        """
        Returns flags in definition order.
        """
        yield from self._iter_member_(self._value_)

    def __len__(self):
        return self._value_.bit_count()

    def __repr__(self):
        cls_name = self.__class__.__name__
        v_repr = self.__class__._value_repr_ or repr
        if self._name_ is None:
            return "<%s: %s>" % (cls_name, v_repr(self._value_))
        else:
            return "<%s.%s: %s>" % (cls_name, self._name_, v_repr(self._value_))

    def __str__(self):
        cls_name = self.__class__.__name__
        if self._name_ is None:
            return '%s(%r)' % (cls_name, self._value_)
        else:
            return "%s.%s" % (cls_name, self._name_)

    def __bool__(self):
        return bool(self._value_)

    def _get_value(self, flag):
        if isinstance(flag, self.__class__):
            return flag._value_
        elif self._member_type_ is not object and isinstance(flag, self._member_type_):
            return flag
        return NotImplemented

    def __or__(self, other):
        other_value = self._get_value(other)
        if other_value is NotImplemented:
            return NotImplemented

        for flag in self, other:
            if self._get_value(flag) is None:
                raise TypeError(f"'{flag}' cannot be combined with other flags with |")
        value = self._value_
        return self.__class__(value | other_value)

    def __and__(self, other):
        other_value = self._get_value(other)
        if other_value is NotImplemented:
            return NotImplemented

        for flag in self, other:
            if self._get_value(flag) is None:
                raise TypeError(f"'{flag}' cannot be combined with other flags with &")
        value = self._value_
        return self.__class__(value & other_value)

    def __xor__(self, other):
        other_value = self._get_value(other)
        if other_value is NotImplemented:
            return NotImplemented

        for flag in self, other:
            if self._get_value(flag) is None:
                raise TypeError(f"'{flag}' cannot be combined with other flags with ^")
        value = self._value_
        return self.__class__(value ^ other_value)

    def __invert__(self):
        if self._get_value(self) is None:
            raise TypeError(f"'{self}' cannot be inverted")

        if self._inverted_ is None:
            if self._boundary_ in (EJECT, KEEP):
                self._inverted_ = self.__class__(~self._value_)
            else:
                self._inverted_ = self.__class__(self._singles_mask_ & ~self._value_)
        return self._inverted_

    __rand__ = __and__
    __ror__ = __or__
    __rxor__ = __xor__


class IntFlag(int, ReprEnum, Flag, boundary=KEEP):
    """
    Support for integer-based Flags
    """


def _high_bit(value):
    """
    returns index of highest bit, or -1 if value is zero or negative
    """
    return value.bit_length() - 1

def unique(enumeration):
    """
    Class decorator for enumerations ensuring unique member values.
    """
    duplicates = []
    for name, member in enumeration.__members__.items():
        if name != member.name:
            duplicates.append((name, member.name))
    if duplicates:
        alias_details = ', '.join(
                ["%s -> %s" % (alias, name) for (alias, name) in duplicates])
        raise ValueError('duplicate values found in %r: %s' %
                (enumeration, alias_details))
    return enumeration

def _dataclass_repr(self):
    dcf = self.__dataclass_fields__
    return ', '.join(
            '%s=%r' % (k, getattr(self, k))
            for k in dcf.keys()
            if dcf[k].repr
            )

def global_enum_repr(self):
    """
    use module.enum_name instead of class.enum_name

    the module is the last module in case of a multi-module name
    """
    module = self.__class__.__module__.split('.')[-1]
    return '%s.%s' % (module, self._name_)

def global_flag_repr(self):
    """
    use module.flag_name instead of class.flag_name

    the module is the last module in case of a multi-module name
    """
    module = self.__class__.__module__.split('.')[-1]
    cls_name = self.__class__.__name__
    if self._name_ is None:
        return "%s.%s(%r)" % (module, cls_name, self._value_)
    if _is_single_bit(self._value_):
        return '%s.%s' % (module, self._name_)
    if self._boundary_ is not FlagBoundary.KEEP:
        return '|'.join(['%s.%s' % (module, name) for name in self.name.split('|')])
    else:
        name = []
        for n in self._name_.split('|'):
            if n[0].isdigit():
                name.append(n)
            else:
                name.append('%s.%s' % (module, n))
        return '|'.join(name)

def global_str(self):
    """
    use enum_name instead of class.enum_name
    """
    if self._name_ is None:
        cls_name = self.__class__.__name__
        return "%s(%r)" % (cls_name, self._value_)
    else:
        return self._name_

def global_enum(cls, update_str=False):
    """
    decorator that makes the repr() of an enum member reference its module
    instead of its class; also exports all members to the enum's module's
    global namespace
    """
    if issubclass(cls, Flag):
        cls.__repr__ = global_flag_repr
    else:
        cls.__repr__ = global_enum_repr
    if not issubclass(cls, ReprEnum) or update_str:
        cls.__str__ = global_str
    sys.modules[cls.__module__].__dict__.update(cls.__members__)
    return cls

def _simple_enum(etype=Enum, *, boundary=None, use_args=None):
    """
    Class decorator that converts a normal class into an :class:`Enum`.  No
    safety checks are done, and some advanced behavior (such as
    :func:`__init_subclass__`) is not available.  Enum creation can be faster
    using :func:`simple_enum`.

        >>> from enum import Enum, _simple_enum
        >>> @_simple_enum(Enum)
        ... class Color:
        ...     RED = auto()
        ...     GREEN = auto()
        ...     BLUE = auto()
        >>> Color
        <enum 'Color'>
    """
    def convert_class(cls):
        nonlocal use_args
        cls_name = cls.__name__
        if use_args is None:
            use_args = etype._use_args_
        __new__ = cls.__dict__.get('__new__')
        if __new__ is not None:
            new_member = __new__.__func__
        else:
            new_member = etype._member_type_.__new__
        attrs = {}
        body = {}
        if __new__ is not None:
            body['__new_member__'] = new_member
        body['_new_member_'] = new_member
        body['_use_args_'] = use_args
        body['_generate_next_value_'] = gnv = etype._generate_next_value_
        body['_member_names_'] = member_names = []
        body['_member_map_'] = member_map = {}
        body['_value2member_map_'] = value2member_map = {}
        body['_unhashable_values_'] = []
        body['_member_type_'] = member_type = etype._member_type_
        body['_value_repr_'] = etype._value_repr_
        if issubclass(etype, Flag):
            body['_boundary_'] = boundary or etype._boundary_
            body['_flag_mask_'] = None
            body['_all_bits_'] = None
            body['_singles_mask_'] = None
            body['_inverted_'] = None
            body['__or__'] = Flag.__or__
            body['__xor__'] = Flag.__xor__
            body['__and__'] = Flag.__and__
            body['__ror__'] = Flag.__ror__
            body['__rxor__'] = Flag.__rxor__
            body['__rand__'] = Flag.__rand__
            body['__invert__'] = Flag.__invert__
        for name, obj in cls.__dict__.items():
            if name in ('__dict__', '__weakref__'):
                continue
            if _is_dunder(name) or _is_private(cls_name, name) or _is_sunder(name) or _is_descriptor(obj):
                body[name] = obj
            else:
                attrs[name] = obj
        if cls.__dict__.get('__doc__') is None:
            body['__doc__'] = 'An enumeration.'
        #
        # double check that repr and friends are not the mixin's or various
        # things break (such as pickle)
        # however, if the method is defined in the Enum itself, don't replace
        # it
        enum_class = type(cls_name, (etype, ), body, boundary=boundary, _simple=True)
        for name in ('__repr__', '__str__', '__format__', '__reduce_ex__'):
            if name not in body:
                # check for mixin overrides before replacing
                enum_method = getattr(etype, name)
                found_method = getattr(enum_class, name)
                object_method = getattr(object, name)
                data_type_method = getattr(member_type, name)
                if found_method in (data_type_method, object_method):
                    setattr(enum_class, name, enum_method)
        gnv_last_values = []
        if issubclass(enum_class, Flag):
            # Flag / IntFlag
            single_bits = multi_bits = 0
            for name, value in attrs.items():
                if isinstance(value, auto) and auto.value is _auto_null:
                    value = gnv(name, 1, len(member_names), gnv_last_values)
                if value in value2member_map:
                    # an alias to an existing member
                    member = value2member_map[value]
                    redirect = property()
                    redirect.member = member
                    redirect.__set_name__(enum_class, name)
                    setattr(enum_class, name, redirect)
                    member_map[name] = member
                else:
                    # create the member
                    if use_args:
                        if not isinstance(value, tuple):
                            value = (value, )
                        member = new_member(enum_class, *value)
                        value = value[0]
                    else:
                        member = new_member(enum_class)
                    if __new__ is None:
                        member._value_ = value
                    member._name_ = name
                    member.__objclass__ = enum_class
                    member.__init__(value)
                    redirect = property()
                    redirect.member = member
                    redirect.__set_name__(enum_class, name)
                    setattr(enum_class, name, redirect)
                    member_map[name] = member
                    member._sort_order_ = len(member_names)
                    value2member_map[value] = member
                    if _is_single_bit(value):
                        # not a multi-bit alias, record in _member_names_ and _flag_mask_
                        member_names.append(name)
                        single_bits |= value
                    else:
                        multi_bits |= value
                    gnv_last_values.append(value)
            enum_class._flag_mask_ = single_bits | multi_bits
            enum_class._singles_mask_ = single_bits
            enum_class._all_bits_ = 2 ** ((single_bits|multi_bits).bit_length()) - 1
            # set correct __iter__
            member_list = [m._value_ for m in enum_class]
            if member_list != sorted(member_list):
                enum_class._iter_member_ = enum_class._iter_member_by_def_
        else:
            # Enum / IntEnum / StrEnum
            for name, value in attrs.items():
                if isinstance(value, auto):
                    if value.value is _auto_null:
                        value.value = gnv(name, 1, len(member_names), gnv_last_values)
                    value = value.value
                if value in value2member_map:
                    # an alias to an existing member
                    member = value2member_map[value]
                    redirect = property()
                    redirect.member = member
                    redirect.__set_name__(enum_class, name)
                    setattr(enum_class, name, redirect)
                    member_map[name] = member
                else:
                    # create the member
                    if use_args:
                        if not isinstance(value, tuple):
                            value = (value, )
                        member = new_member(enum_class, *value)
                        value = value[0]
                    else:
                        member = new_member(enum_class)
                    if __new__ is None:
                        member._value_ = value
                    member._name_ = name
                    member.__objclass__ = enum_class
                    member.__init__(value)
                    member._sort_order_ = len(member_names)
                    redirect = property()
                    redirect.member = member
                    redirect.__set_name__(enum_class, name)
                    setattr(enum_class, name, redirect)
                    member_map[name] = member
                    value2member_map[value] = member
                    member_names.append(name)
                    gnv_last_values.append(value)
        if '__new__' in body:
            enum_class.__new_member__ = enum_class.__new__
        enum_class.__new__ = Enum.__new__
        return enum_class
    return convert_class

@_simple_enum(StrEnum)
class EnumCheck:
    """
    various conditions to check an enumeration for
    """
    CONTINUOUS = "no skipped integer values"
    NAMED_FLAGS = "multi-flag aliases may not contain unnamed flags"
    UNIQUE = "one name per value"
CONTINUOUS, NAMED_FLAGS, UNIQUE = EnumCheck


class verify:
    """
    Check an enumeration for various constraints. (see EnumCheck)
    """
    def __init__(self, *checks):
        self.checks = checks
    def __call__(self, enumeration):
        checks = self.checks
        cls_name = enumeration.__name__
        if Flag is not None and issubclass(enumeration, Flag):
            enum_type = 'flag'
        elif issubclass(enumeration, Enum):
            enum_type = 'enum'
        else:
            raise TypeError("the 'verify' decorator only works with Enum and Flag")
        for check in checks:
            if check is UNIQUE:
                # check for duplicate names
                duplicates = []
                for name, member in enumeration.__members__.items():
                    if name != member.name:
                        duplicates.append((name, member.name))
                if duplicates:
                    alias_details = ', '.join(
                            ["%s -> %s" % (alias, name) for (alias, name) in duplicates])
                    raise ValueError('aliases found in %r: %s' %
                            (enumeration, alias_details))
            elif check is CONTINUOUS:
                values = set(e.value for e in enumeration)
                if len(values) < 2:
                    continue
                low, high = min(values), max(values)
                missing = []
                if enum_type == 'flag':
                    # check for powers of two
                    for i in range(_high_bit(low)+1, _high_bit(high)):
                        if 2**i not in values:
                            missing.append(2**i)
                elif enum_type == 'enum':
                    # check for powers of one
                    for i in range(low+1, high):
                        if i not in values:
                            missing.append(i)
                else:
                    raise Exception('verify: unknown type %r' % enum_type)
                if missing:
                    raise ValueError(('invalid %s %r: missing values %s' % (
                            enum_type, cls_name, ', '.join((str(m) for m in missing)))
                            )[:256])
                            # limit max length to protect against DOS attacks
            elif check is NAMED_FLAGS:
                # examine each alias and check for unnamed flags
                member_names = enumeration._member_names_
                member_values = [m.value for m in enumeration]
                missing_names = []
                missing_value = 0
                for name, alias in enumeration._member_map_.items():
                    if name in member_names:
                        # not an alias
                        continue
                    if alias.value < 0:
                        # negative numbers are not checked
                        continue
                    values = list(_iter_bits_lsb(alias.value))
                    missed = [v for v in values if v not in member_values]
                    if missed:
                        missing_names.append(name)
                        missing_value |= reduce(_or_, missed)
                if missing_names:
                    if len(missing_names) == 1:
                        alias = 'alias %s is missing' % missing_names[0]
                    else:
                        alias = 'aliases %s and %s are missing' % (
                                ', '.join(missing_names[:-1]), missing_names[-1]
                                )
                    if _is_single_bit(missing_value):
                        value = 'value 0x%x' % missing_value
                    else:
                        value = 'combined values of 0x%x' % missing_value
                    raise ValueError(
                            'invalid Flag %r: %s %s [use enum.show_flag_values(value) for details]'
                            % (cls_name, alias, value)
                            )
        return enumeration

def _test_simple_enum(checked_enum, simple_enum):
    """
    A function that can be used to test an enum created with :func:`_simple_enum`
    against the version created by subclassing :class:`Enum`::

        >>> from enum import Enum, _simple_enum, _test_simple_enum
        >>> @_simple_enum(Enum)
        ... class Color:
        ...     RED = auto()
        ...     GREEN = auto()
        ...     BLUE = auto()
        >>> class CheckedColor(Enum):
        ...     RED = auto()
        ...     GREEN = auto()
        ...     BLUE = auto()
        >>> _test_simple_enum(CheckedColor, Color)

    If differences are found, a :exc:`TypeError` is raised.
    """
    failed = []
    if checked_enum.__dict__ != simple_enum.__dict__:
        checked_dict = checked_enum.__dict__
        checked_keys = list(checked_dict.keys())
        simple_dict = simple_enum.__dict__
        simple_keys = list(simple_dict.keys())
        member_names = set(
                list(checked_enum._member_map_.keys())
                + list(simple_enum._member_map_.keys())
                )
        for key in set(checked_keys + simple_keys):
            if key in ('__module__', '_member_map_', '_value2member_map_', '__doc__'):
                # keys known to be different, or very long
                continue
            elif key in member_names:
                # members are checked below
                continue
            elif key not in simple_keys:
                failed.append("missing key: %r" % (key, ))
            elif key not in checked_keys:
                failed.append("extra key:   %r" % (key, ))
            else:
                checked_value = checked_dict[key]
                simple_value = simple_dict[key]
                if callable(checked_value) or isinstance(checked_value, bltns.property):
                    continue
                if key == '__doc__':
                    # remove all spaces/tabs
                    compressed_checked_value = checked_value.replace(' ','').replace('\t','')
                    compressed_simple_value = simple_value.replace(' ','').replace('\t','')
                    if compressed_checked_value != compressed_simple_value:
                        failed.append("%r:\n         %s\n         %s" % (
                                key,
                                "checked -> %r" % (checked_value, ),
                                "simple  -> %r" % (simple_value, ),
                                ))
                elif checked_value != simple_value:
                    failed.append("%r:\n         %s\n         %s" % (
                            key,
                            "checked -> %r" % (checked_value, ),
                            "simple  -> %r" % (simple_value, ),
                            ))
        failed.sort()
        for name in member_names:
            failed_member = []
            if name not in simple_keys:
                failed.append('missing member from simple enum: %r' % name)
            elif name not in checked_keys:
                failed.append('extra member in simple enum: %r' % name)
            else:
                checked_member_dict = checked_enum[name].__dict__
                checked_member_keys = list(checked_member_dict.keys())
                simple_member_dict = simple_enum[name].__dict__
                simple_member_keys = list(simple_member_dict.keys())
                for key in set(checked_member_keys + simple_member_keys):
                    if key in ('__module__', '__objclass__', '_inverted_'):
                        # keys known to be different or absent
                        continue
                    elif key not in simple_member_keys:
                        failed_member.append("missing key %r not in the simple enum member %r" % (key, name))
                    elif key not in checked_member_keys:
                        failed_member.append("extra key %r in simple enum member %r" % (key, name))
                    else:
                        checked_value = checked_member_dict[key]
                        simple_value = simple_member_dict[key]
                        if checked_value != simple_value:
                            failed_member.append("%r:\n         %s\n         %s" % (
                                    key,
                                    "checked member -> %r" % (checked_value, ),
                                    "simple member  -> %r" % (simple_value, ),
                                    ))
            if failed_member:
                failed.append('%r member mismatch:\n      %s' % (
                        name, '\n      '.join(failed_member),
                        ))
        for method in (
                '__str__', '__repr__', '__reduce_ex__', '__format__',
                '__getnewargs_ex__', '__getnewargs__', '__reduce_ex__', '__reduce__'
            ):
            if method in simple_keys and method in checked_keys:
                # cannot compare functions, and it exists in both, so we're good
                continue
            elif method not in simple_keys and method not in checked_keys:
                # method is inherited -- check it out
                checked_method = getattr(checked_enum, method, None)
                simple_method = getattr(simple_enum, method, None)
                if hasattr(checked_method, '__func__'):
                    checked_method = checked_method.__func__
                    simple_method = simple_method.__func__
                if checked_method != simple_method:
                    failed.append("%r:  %-30s %s" % (
                            method,
                            "checked -> %r" % (checked_method, ),
                            "simple -> %r" % (simple_method, ),
                            ))
            else:
                # if the method existed in only one of the enums, it will have been caught
                # in the first checks above
                pass
    if failed:
        raise TypeError('enum mismatch:\n   %s' % '\n   '.join(failed))

def _old_convert_(etype, name, module, filter, source=None, *, boundary=None):
    """
    Create a new Enum subclass that replaces a collection of global constants
    """
    # convert all constants from source (or module) that pass filter() to
    # a new Enum called name, and export the enum and its members back to
    # module;
    # also, replace the __reduce_ex__ method so unpickling works in
    # previous Python versions
    module_globals = sys.modules[module].__dict__
    if source:
        source = source.__dict__
    else:
        source = module_globals
    # _value2member_map_ is populated in the same order every time
    # for a consistent reverse mapping of number to name when there
    # are multiple names for the same number.
    members = [
            (name, value)
            for name, value in source.items()
            if filter(name)]
    try:
        # sort by value
        members.sort(key=lambda t: (t[1], t[0]))
    except TypeError:
        # unless some values aren't comparable, in which case sort by name
        members.sort(key=lambda t: t[0])
    cls = etype(name, members, module=module, boundary=boundary or KEEP)
    return cls

_stdlib_enums = IntEnum, StrEnum, IntFlag