Mercurial > repos > shellac > sam_consensus_v3

annotate env/lib/python3.9/site-packages/rdflib/compat.py @ 0:4f3585e2f14b draft default tip

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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author shellac
date Mon, 22 Mar 2021 18:12:50 +0000
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1 """
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2 Utility functions and objects to ease Python 2/3 compatibility,
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3 and different versions of support libraries.
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4 """
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5 from __future__ import absolute_import
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6 from __future__ import division
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7 from __future__ import print_function
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8
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9 import re
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10 import codecs
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11 import warnings
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12
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13 import six
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14
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15
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16 # clean ElementTree import
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17 try:
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18 from lxml import etree
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19 except ImportError:
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20 try:
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21 # Python 2.5
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22 import xml.etree.cElementTree as etree
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23 except ImportError:
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24 try:
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25 # Python 2.5
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26 import xml.etree.ElementTree as etree
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27 except ImportError:
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28 try:
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29 # normal cElementTree install
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30 import cElementTree as etree
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31 except ImportError:
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32 try:
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33 # normal ElementTree install
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34 import elementtree.ElementTree as etree
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35 except ImportError:
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36 raise Exception(
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37 "Failed to import ElementTree from any known place")
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38
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39 try:
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40 etree_register_namespace = etree.register_namespace
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41 except AttributeError:
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42
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43 import xml.etree.ElementTree as etreenative
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44
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45 def etree_register_namespace(prefix, uri):
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46 etreenative._namespace_map[uri] = prefix
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47
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48
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49 def cast_bytes(s, enc='utf-8'):
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50 if isinstance(s, six.text_type):
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51 return s.encode(enc)
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52 return s
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53
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54
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55 if six.PY3:
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56 # Python 3:
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57 # ---------
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58
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59 def ascii(stream):
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60 return codecs.getreader('ascii')(stream)
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61
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62 def bopen(*args, **kwargs):
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63 return open(*args, mode='rb', **kwargs)
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64
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65 long_type = int
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66
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67 def sign(n):
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68 if n < 0:
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69 return -1
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70 if n > 0:
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71 return 1
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72 return 0
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73
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74 else:
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75 # Python 2
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76 # --------
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77
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78 def ascii(stream):
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79 return stream
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80
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81 bopen = open
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82
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83 long_type = long
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84
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85 def sign(n):
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86 return cmp(n, 0)
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87
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88 r_unicodeEscape = re.compile(r'(\\u[0-9A-Fa-f]{4}|\\U[0-9A-Fa-f]{8})')
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89
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90
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91 def _unicodeExpand(s):
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92 return r_unicodeEscape.sub(lambda m: six.unichr(int(m.group(0)[2:], 16)), s)
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93
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94
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95 narrow_build = False
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96 try:
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97 six.unichr(0x10FFFF)
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98 except ValueError:
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99 narrow_build = True
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100
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101 if narrow_build:
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102 def _unicodeExpand(s):
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103 try:
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104 return r_unicodeEscape.sub(
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105 lambda m: six.unichr(int(m.group(0)[2:], 16)), s)
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106 except ValueError:
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107 warnings.warn(
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108 'Encountered a unicode char > 0xFFFF in a narrow python build. '
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109 'Trying to degrade gracefully, but this can cause problems '
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110 'later when working with the string:\n%s' % s)
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111 return r_unicodeEscape.sub(
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112 lambda m: codecs.decode(m.group(0), 'unicode_escape'), s)
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113
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114
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115 def decodeStringEscape(s):
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116 """
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117 s is byte-string - replace \ escapes in string
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118 """
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119
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120 if not six.PY3:
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121 s = s.decode('string-escape')
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122 else:
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123 s = s.replace('\\t', '\t')
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124 s = s.replace('\\n', '\n')
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125 s = s.replace('\\r', '\r')
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126 s = s.replace('\\b', '\b')
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127 s = s.replace('\\f', '\f')
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128 s = s.replace('\\"', '"')
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129 s = s.replace("\\'", "'")
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130 s = s.replace('\\\\', '\\')
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131
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132 return s
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133 # return _unicodeExpand(s) # hmm - string escape doesn't do unicode escaping
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134
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135
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136 def decodeUnicodeEscape(s):
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137 """
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138 s is a unicode string
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139 replace ``\\n`` and ``\\u00AC`` unicode escapes
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140 """
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141 if not six.PY3:
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142 s = s.encode('utf-8').decode('string-escape')
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143 s = _unicodeExpand(s)
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144 else:
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145 s = s.replace('\\t', '\t')
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146 s = s.replace('\\n', '\n')
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147 s = s.replace('\\r', '\r')
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148 s = s.replace('\\b', '\b')
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149 s = s.replace('\\f', '\f')
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150 s = s.replace('\\"', '"')
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151 s = s.replace("\\'", "'")
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152 s = s.replace('\\\\', '\\')
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153
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154 s = _unicodeExpand(s) # hmm - string escape doesn't do unicode escaping
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155
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156 return s
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157
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158
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159 # Migration to abc in Python 3.8
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160 try:
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161 from collections.abc import Mapping, MutableMapping
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162 except:
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163 from collections import Mapping, MutableMapping