Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/humanfriendly/compat.py @ 0:4f3585e2f14b draft default tip
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author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 # Human friendly input/output in Python. |
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2 # |
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3 # Author: Peter Odding <peter@peterodding.com> |
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4 # Last Change: December 10, 2020 |
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5 # URL: https://humanfriendly.readthedocs.io |
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6 |
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7 """ |
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8 Compatibility with Python 2 and 3. |
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9 |
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10 This module exposes aliases and functions that make it easier to write Python |
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11 code that is compatible with Python 2 and Python 3. |
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12 |
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13 .. data:: basestring |
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14 |
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15 Alias for :func:`python2:basestring` (in Python 2) or :class:`python3:str` |
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16 (in Python 3). See also :func:`is_string()`. |
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17 |
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18 .. data:: HTMLParser |
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19 |
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20 Alias for :class:`python2:HTMLParser.HTMLParser` (in Python 2) or |
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21 :class:`python3:html.parser.HTMLParser` (in Python 3). |
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22 |
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23 .. data:: interactive_prompt |
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24 |
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25 Alias for :func:`python2:raw_input()` (in Python 2) or |
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26 :func:`python3:input()` (in Python 3). |
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27 |
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28 .. data:: StringIO |
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29 |
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30 Alias for :class:`python2:StringIO.StringIO` (in Python 2) or |
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31 :class:`python3:io.StringIO` (in Python 3). |
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32 |
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33 .. data:: unicode |
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34 |
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35 Alias for :func:`python2:unicode` (in Python 2) or :class:`python3:str` (in |
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36 Python 3). See also :func:`coerce_string()`. |
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37 |
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38 .. data:: monotonic |
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39 |
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40 Alias for :func:`python3:time.monotonic()` (in Python 3.3 and higher) or |
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41 `monotonic.monotonic()` (a `conditional dependency |
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42 <https://pypi.org/project/monotonic/>`_ on older Python versions). |
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43 """ |
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44 |
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45 __all__ = ( |
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46 'HTMLParser', |
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47 'StringIO', |
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48 'basestring', |
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49 'coerce_string', |
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50 'interactive_prompt', |
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51 'is_string', |
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52 'is_unicode', |
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53 'monotonic', |
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54 'name2codepoint', |
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55 'on_macos', |
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56 'on_windows', |
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57 'unichr', |
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58 'unicode', |
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59 # This export remains here so as not to break my dozen or so other Python |
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60 # projects using 'from humanfriendly.compat import unittest' from good old |
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61 # times (when Python 2.6 was still a thing). It will eventually be removed. |
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62 'unittest', |
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63 'which', |
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64 ) |
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65 |
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66 # Standard library modules. |
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67 import sys |
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68 import unittest |
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69 |
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70 # Differences between Python 2 and 3. |
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71 try: |
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72 # Python 2. |
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73 unicode = unicode |
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74 unichr = unichr |
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75 basestring = basestring |
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76 interactive_prompt = raw_input |
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77 from distutils.spawn import find_executable as which |
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78 from HTMLParser import HTMLParser |
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79 from StringIO import StringIO |
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80 from htmlentitydefs import name2codepoint |
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81 except (ImportError, NameError): |
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82 # Python 3. |
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83 unicode = str |
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84 unichr = chr |
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85 basestring = str |
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86 interactive_prompt = input |
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87 from shutil import which |
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88 from html.parser import HTMLParser |
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89 from io import StringIO |
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90 from html.entities import name2codepoint |
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91 |
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92 try: |
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93 # Python 3.3 and higher. |
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94 from time import monotonic |
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95 except ImportError: |
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96 # A replacement for older Python versions: |
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97 # https://pypi.org/project/monotonic/ |
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98 try: |
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99 from monotonic import monotonic |
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100 except (ImportError, RuntimeError): |
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101 # We fall back to the old behavior of using time.time() instead of |
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102 # failing when {time,monotonic}.monotonic() are both missing. |
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103 from time import time as monotonic |
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104 |
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105 |
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106 def coerce_string(value): |
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107 """ |
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108 Coerce any value to a Unicode string (:func:`python2:unicode` in Python 2 and :class:`python3:str` in Python 3). |
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109 |
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110 :param value: The value to coerce. |
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111 :returns: The value coerced to a Unicode string. |
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112 """ |
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113 return value if is_string(value) else unicode(value) |
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114 |
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115 |
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116 def is_string(value): |
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117 """ |
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118 Check if a value is a :func:`python2:basestring` (in Python 2) or :class:`python3:str` (in Python 3) object. |
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119 |
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120 :param value: The value to check. |
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121 :returns: :data:`True` if the value is a string, :data:`False` otherwise. |
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122 """ |
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123 return isinstance(value, basestring) |
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124 |
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125 |
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126 def is_unicode(value): |
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127 """ |
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128 Check if a value is a :func:`python2:unicode` (in Python 2) or :class:`python2:str` (in Python 3) object. |
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129 |
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130 :param value: The value to check. |
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131 :returns: :data:`True` if the value is a Unicode string, :data:`False` otherwise. |
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132 """ |
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133 return isinstance(value, unicode) |
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134 |
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135 |
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136 def on_macos(): |
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137 """ |
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138 Check if we're running on Apple MacOS. |
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139 |
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140 :returns: :data:`True` if running MacOS, :data:`False` otherwise. |
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141 """ |
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142 return sys.platform.startswith('darwin') |
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143 |
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144 |
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145 def on_windows(): |
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146 """ |
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147 Check if we're running on the Microsoft Windows OS. |
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148 |
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149 :returns: :data:`True` if running Windows, :data:`False` otherwise. |
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150 """ |
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151 return sys.platform.startswith('win') |