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
|
Metadata-Version: 2.1
Name: humanfriendly
Version: 10.0
Summary: Human friendly output for text interfaces using Python
Home-page: https://humanfriendly.readthedocs.io
Author: Peter Odding
Author-email: peter@peterodding.com
License: MIT
Platform: UNKNOWN
Classifier: Development Status :: 6 - Mature
Classifier: Environment :: Console
Classifier: Framework :: Sphinx :: Extension
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: System Administrators
Classifier: License :: OSI Approved :: MIT License
Classifier: Natural Language :: English
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: Communications
Classifier: Topic :: Scientific/Engineering :: Human Machine Interfaces
Classifier: Topic :: Software Development
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: Software Development :: User Interfaces
Classifier: Topic :: System :: Shells
Classifier: Topic :: System :: System Shells
Classifier: Topic :: System :: Systems Administration
Classifier: Topic :: Terminals
Classifier: Topic :: Text Processing :: General
Classifier: Topic :: Text Processing :: Linguistic
Classifier: Topic :: Utilities
Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
Requires-Dist: monotonic ; python_version == "2.7"
Requires-Dist: pyreadline ; sys_platform == "win32" and python_version<"3.8"
Requires-Dist: pyreadline3 ; sys_platform == "win32" and python_version>="3.8"
humanfriendly: Human friendly input/output in Python
====================================================
.. image:: https://github.com/xolox/python-humanfriendly/actions/workflows/test.yml/badge.svg?branch=master
:target: https://github.com/xolox/python-humanfriendly/actions
.. image:: https://codecov.io/gh/xolox/python-humanfriendly/branch/master/graph/badge.svg?token=jYaj4T74TU
:target: https://codecov.io/gh/xolox/python-humanfriendly
The functions and classes in the `humanfriendly` package can be used to make
text interfaces more user friendly. Some example features:
- Parsing and formatting numbers, file sizes, pathnames and timespans in
simple, human friendly formats.
- Easy to use timers for long running operations, with human friendly
formatting of the resulting timespans.
- Prompting the user to select a choice from a list of options by typing the
option's number or a unique substring of the option.
- Terminal interaction including text styling (`ANSI escape sequences`_), user
friendly rendering of usage messages and querying the terminal for its
size.
The `humanfriendly` package is currently tested on Python 2.7, 3.5+ and PyPy
(2.7) on Linux and macOS. While the intention is to support Windows as well,
you may encounter some rough edges.
.. contents::
:local:
Getting started
---------------
It's very simple to start using the `humanfriendly` package::
>>> from humanfriendly import format_size, parse_size
>>> from humanfriendly.prompts import prompt_for_input
>>> user_input = prompt_for_input("Enter a readable file size: ")
Enter a readable file size: 16G
>>> num_bytes = parse_size(user_input)
>>> print(num_bytes)
16000000000
>>> print("You entered:", format_size(num_bytes))
You entered: 16 GB
>>> print("You entered:", format_size(num_bytes, binary=True))
You entered: 14.9 GiB
To get a demonstration of supported terminal text styles (based on
`ANSI escape sequences`_) you can run the following command::
$ humanfriendly --demo
Command line
------------
.. A DRY solution to avoid duplication of the `humanfriendly --help' text:
..
.. [[[cog
.. from humanfriendly.usage import inject_usage
.. inject_usage('humanfriendly.cli')
.. ]]]
**Usage:** `humanfriendly [OPTIONS]`
Human friendly input/output (text formatting) on the command
line based on the Python package with the same name.
**Supported options:**
.. csv-table::
:header: Option, Description
:widths: 30, 70
"``-c``, ``--run-command``","Execute an external command (given as the positional arguments) and render
a spinner and timer while the command is running. The exit status of the
command is propagated."
``--format-table``,"Read tabular data from standard input (each line is a row and each
whitespace separated field is a column), format the data as a table and
print the resulting table to standard output. See also the ``--delimiter``
option."
"``-d``, ``--delimiter=VALUE``","Change the delimiter used by ``--format-table`` to ``VALUE`` (a string). By default
all whitespace is treated as a delimiter."
"``-l``, ``--format-length=LENGTH``","Convert a length count (given as the integer or float ``LENGTH``) into a human
readable string and print that string to standard output."
"``-n``, ``--format-number=VALUE``","Format a number (given as the integer or floating point number ``VALUE``) with
thousands separators and two decimal places (if needed) and print the
formatted number to standard output."
"``-s``, ``--format-size=BYTES``","Convert a byte count (given as the integer ``BYTES``) into a human readable
string and print that string to standard output."
"``-b``, ``--binary``","Change the output of ``-s``, ``--format-size`` to use binary multiples of bytes
(base-2) instead of the default decimal multiples of bytes (base-10)."
"``-t``, ``--format-timespan=SECONDS``","Convert a number of seconds (given as the floating point number ``SECONDS``)
into a human readable timespan and print that string to standard output."
``--parse-length=VALUE``,"Parse a human readable length (given as the string ``VALUE``) and print the
number of metres to standard output."
``--parse-size=VALUE``,"Parse a human readable data size (given as the string ``VALUE``) and print the
number of bytes to standard output."
``--demo``,"Demonstrate changing the style and color of the terminal font using ANSI
escape sequences."
"``-h``, ``--help``",Show this message and exit.
.. [[[end]]]
A note about size units
-----------------------
When I originally published the `humanfriendly` package I went with binary
multiples of bytes (powers of two). It was pointed out several times that this
was a poor choice (see issue `#4`_ and pull requests `#8`_ and `#9`_) and thus
the new default became decimal multiples of bytes (powers of ten):
+------+---------------+---------------+
| Unit | Binary value | Decimal value |
+------+---------------+---------------+
| KB | 1024 | 1000 +
+------+---------------+---------------+
| MB | 1048576 | 1000000 |
+------+---------------+---------------+
| GB | 1073741824 | 1000000000 |
+------+---------------+---------------+
| TB | 1099511627776 | 1000000000000 |
+------+---------------+---------------+
| etc | | |
+------+---------------+---------------+
The option to use binary multiples of bytes remains by passing the keyword
argument `binary=True` to the `format_size()`_ and `parse_size()`_ functions.
Windows support
---------------
Windows 10 gained native support for ANSI escape sequences which means commands
like ``humanfriendly --demo`` should work out of the box (if your system is
up-to-date enough). If this doesn't work then you can install the colorama_
package, it will be used automatically once installed.
Contact
-------
The latest version of `humanfriendly` is available on PyPI_ and GitHub_. The
documentation is hosted on `Read the Docs`_ and includes a changelog_. For bug
reports please create an issue on GitHub_. If you have questions, suggestions,
etc. feel free to send me an e-mail at `peter@peterodding.com`_.
License
-------
This software is licensed under the `MIT license`_.
© 2021 Peter Odding.
.. External references:
.. _#4: https://github.com/xolox/python-humanfriendly/issues/4
.. _#8: https://github.com/xolox/python-humanfriendly/pull/8
.. _#9: https://github.com/xolox/python-humanfriendly/pull/9
.. _ANSI escape sequences: https://en.wikipedia.org/wiki/ANSI_escape_code
.. _changelog: https://humanfriendly.readthedocs.io/en/latest/changelog.html
.. _colorama: https://pypi.org/project/colorama
.. _format_size(): https://humanfriendly.readthedocs.io/en/latest/#humanfriendly.format_size
.. _GitHub: https://github.com/xolox/python-humanfriendly
.. _MIT license: https://en.wikipedia.org/wiki/MIT_License
.. _parse_size(): https://humanfriendly.readthedocs.io/en/latest/#humanfriendly.parse_size
.. _peter@peterodding.com: peter@peterodding.com
.. _PyPI: https://pypi.org/project/humanfriendly
.. _Read the Docs: https://humanfriendly.readthedocs.io
|
