From e0e3e1717e3d33762ce61950504f9637a6e669ed Mon Sep 17 00:00:00 2001
From: nkozlovskiy <nmk@ydb.tech>
Date: Fri, 29 Sep 2023 12:24:06 +0300
Subject: add ydb deps
---
.../python/ipython/py2/IPython/utils/contexts.py | 74 ++++++++++++++++++++++
1 file changed, 74 insertions(+)
create mode 100644 contrib/python/ipython/py2/IPython/utils/contexts.py
(limited to 'contrib/python/ipython/py2/IPython/utils/contexts.py')
diff --git a/contrib/python/ipython/py2/IPython/utils/contexts.py b/contrib/python/ipython/py2/IPython/utils/contexts.py
new file mode 100644
index 0000000000..4d379b0eda
--- /dev/null
+++ b/contrib/python/ipython/py2/IPython/utils/contexts.py
@@ -0,0 +1,74 @@
+# encoding: utf-8
+"""Miscellaneous context managers.
+"""
+
+import warnings
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+class preserve_keys(object):
+ """Preserve a set of keys in a dictionary.
+
+ Upon entering the context manager the current values of the keys
+ will be saved. Upon exiting, the dictionary will be updated to
+ restore the original value of the preserved keys. Preserved keys
+ which did not exist when entering the context manager will be
+ deleted.
+
+ Examples
+ --------
+
+ >>> d = {'a': 1, 'b': 2, 'c': 3}
+ >>> with preserve_keys(d, 'b', 'c', 'd'):
+ ... del d['a']
+ ... del d['b'] # will be reset to 2
+ ... d['c'] = None # will be reset to 3
+ ... d['d'] = 4 # will be deleted
+ ... d['e'] = 5
+ ... print(sorted(d.items()))
+ ...
+ [('c', None), ('d', 4), ('e', 5)]
+ >>> print(sorted(d.items()))
+ [('b', 2), ('c', 3), ('e', 5)]
+ """
+
+ def __init__(self, dictionary, *keys):
+ self.dictionary = dictionary
+ self.keys = keys
+
+ def __enter__(self):
+ # Actions to perform upon exiting.
+ to_delete = []
+ to_update = {}
+
+ d = self.dictionary
+ for k in self.keys:
+ if k in d:
+ to_update[k] = d[k]
+ else:
+ to_delete.append(k)
+
+ self.to_delete = to_delete
+ self.to_update = to_update
+
+ def __exit__(self, *exc_info):
+ d = self.dictionary
+
+ for k in self.to_delete:
+ d.pop(k, None)
+ d.update(self.to_update)
+
+
+class NoOpContext(object):
+ """
+ Deprecated
+
+ Context manager that does nothing."""
+
+ def __init__(self):
+ warnings.warn("""NoOpContext is deprecated since IPython 5.0 """,
+ DeprecationWarning, stacklevel=2)
+
+ def __enter__(self): pass
+ def __exit__(self, type, value, traceback): pass
--
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