Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/humanfriendly/compat.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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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: March 1, 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_windows',
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56 'unichr',
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57 'unicode',
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58 # This export remains here so as not to break my dozen or so other Python
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59 # projects using 'from humanfriendly.compat import unittest' from good old
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60 # times (when Python 2.6 was still a thing). It will eventually be removed.
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61 'unittest',
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62 'which',
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63 )
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64
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65 # Standard library modules.
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66 import sys
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67 import unittest
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68
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69 # Differences between Python 2 and 3.
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70 try:
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71 # Python 2.
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72 unicode = unicode
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73 unichr = unichr
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74 basestring = basestring
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75 interactive_prompt = raw_input
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76 from distutils.spawn import find_executable as which
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77 from HTMLParser import HTMLParser
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78 from StringIO import StringIO
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79 from htmlentitydefs import name2codepoint
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80 except (ImportError, NameError):
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81 # Python 3.
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82 unicode = str
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83 unichr = chr
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84 basestring = str
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85 interactive_prompt = input
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86 from shutil import which
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87 from html.parser import HTMLParser
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88 from io import StringIO
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89 from html.entities import name2codepoint
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90
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91 try:
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92 # Python 3.3 and higher.
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93 from time import monotonic
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94 except ImportError:
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95 # A replacement for older Python versions:
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96 # https://pypi.org/project/monotonic/
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97 try:
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98 from monotonic import monotonic
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99 except (ImportError, RuntimeError):
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100 # We fall back to the old behavior of using time.time() instead of
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101 # failing when {time,monotonic}.monotonic() are both missing.
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102 from time import time as monotonic
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103
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104
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105 def coerce_string(value):
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106 """
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107 Coerce any value to a Unicode string (:func:`python2:unicode` in Python 2 and :class:`python3:str` in Python 3).
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108
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109 :param value: The value to coerce.
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110 :returns: The value coerced to a Unicode string.
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111 """
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112 return value if is_string(value) else unicode(value)
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113
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114
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115 def is_string(value):
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116 """
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117 Check if a value is a :func:`python2:basestring` (in Python 2) or :class:`python3:str` (in Python 3) object.
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118
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119 :param value: The value to check.
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120 :returns: :data:`True` if the value is a string, :data:`False` otherwise.
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121 """
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122 return isinstance(value, basestring)
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123
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124
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125 def is_unicode(value):
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126 """
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127 Check if a value is a :func:`python2:unicode` (in Python 2) or :class:`python2:str` (in Python 3) object.
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128
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129 :param value: The value to check.
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130 :returns: :data:`True` if the value is a Unicode string, :data:`False` otherwise.
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131 """
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132 return isinstance(value, unicode)
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133
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134
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135 def on_windows():
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136 """
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137 Check if we're running on the Microsoft Windows OS.
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138
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139 :returns: :data:`True` if running Windows, :data:`False` otherwise.
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140 """
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141 return sys.platform.startswith('win')