Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/markupsafe/__init__.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 # -*- coding: utf-8 -*-
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2 """
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3 markupsafe
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4 ~~~~~~~~~~
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5
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6 Implements an escape function and a Markup string to replace HTML
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7 special characters with safe representations.
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8
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9 :copyright: 2010 Pallets
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10 :license: BSD-3-Clause
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11 """
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12 import re
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13 import string
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14
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15 from ._compat import int_types
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16 from ._compat import iteritems
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17 from ._compat import Mapping
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18 from ._compat import PY2
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19 from ._compat import string_types
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20 from ._compat import text_type
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21 from ._compat import unichr
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22
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23 __version__ = "1.1.1"
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24
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25 __all__ = ["Markup", "soft_unicode", "escape", "escape_silent"]
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26
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27 _striptags_re = re.compile(r"(<!--.*?-->|<[^>]*>)")
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28 _entity_re = re.compile(r"&([^& ;]+);")
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29
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30
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31 class Markup(text_type):
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32 """A string that is ready to be safely inserted into an HTML or XML
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33 document, either because it was escaped or because it was marked
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34 safe.
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35
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36 Passing an object to the constructor converts it to text and wraps
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37 it to mark it safe without escaping. To escape the text, use the
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38 :meth:`escape` class method instead.
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39
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40 >>> Markup('Hello, <em>World</em>!')
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41 Markup('Hello, <em>World</em>!')
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42 >>> Markup(42)
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43 Markup('42')
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44 >>> Markup.escape('Hello, <em>World</em>!')
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45 Markup('Hello &lt;em&gt;World&lt;/em&gt;!')
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46
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47 This implements the ``__html__()`` interface that some frameworks
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48 use. Passing an object that implements ``__html__()`` will wrap the
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49 output of that method, marking it safe.
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50
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51 >>> class Foo:
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52 ... def __html__(self):
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53 ... return '<a href="/foo">foo</a>'
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54 ...
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55 >>> Markup(Foo())
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56 Markup('<a href="/foo">foo</a>')
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57
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58 This is a subclass of the text type (``str`` in Python 3,
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59 ``unicode`` in Python 2). It has the same methods as that type, but
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60 all methods escape their arguments and return a ``Markup`` instance.
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61
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62 >>> Markup('<em>%s</em>') % 'foo & bar'
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63 Markup('<em>foo &amp; bar</em>')
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64 >>> Markup('<em>Hello</em> ') + '<foo>'
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65 Markup('<em>Hello</em> &lt;foo&gt;')
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66 """
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67
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68 __slots__ = ()
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69
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70 def __new__(cls, base=u"", encoding=None, errors="strict"):
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71 if hasattr(base, "__html__"):
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72 base = base.__html__()
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73 if encoding is None:
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74 return text_type.__new__(cls, base)
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75 return text_type.__new__(cls, base, encoding, errors)
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76
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77 def __html__(self):
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78 return self
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79
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80 def __add__(self, other):
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81 if isinstance(other, string_types) or hasattr(other, "__html__"):
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82 return self.__class__(super(Markup, self).__add__(self.escape(other)))
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83 return NotImplemented
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84
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85 def __radd__(self, other):
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86 if hasattr(other, "__html__") or isinstance(other, string_types):
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87 return self.escape(other).__add__(self)
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88 return NotImplemented
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89
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90 def __mul__(self, num):
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91 if isinstance(num, int_types):
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92 return self.__class__(text_type.__mul__(self, num))
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93 return NotImplemented
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94
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95 __rmul__ = __mul__
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96
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97 def __mod__(self, arg):
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98 if isinstance(arg, tuple):
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99 arg = tuple(_MarkupEscapeHelper(x, self.escape) for x in arg)
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100 else:
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101 arg = _MarkupEscapeHelper(arg, self.escape)
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102 return self.__class__(text_type.__mod__(self, arg))
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103
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104 def __repr__(self):
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105 return "%s(%s)" % (self.__class__.__name__, text_type.__repr__(self))
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106
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107 def join(self, seq):
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108 return self.__class__(text_type.join(self, map(self.escape, seq)))
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109
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110 join.__doc__ = text_type.join.__doc__
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111
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112 def split(self, *args, **kwargs):
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113 return list(map(self.__class__, text_type.split(self, *args, **kwargs)))
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114
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115 split.__doc__ = text_type.split.__doc__
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116
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117 def rsplit(self, *args, **kwargs):
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118 return list(map(self.__class__, text_type.rsplit(self, *args, **kwargs)))
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119
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120 rsplit.__doc__ = text_type.rsplit.__doc__
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121
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122 def splitlines(self, *args, **kwargs):
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123 return list(map(self.__class__, text_type.splitlines(self, *args, **kwargs)))
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124
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125 splitlines.__doc__ = text_type.splitlines.__doc__
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126
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127 def unescape(self):
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128 """Convert escaped markup back into a text string. This replaces
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129 HTML entities with the characters they represent.
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130
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131 >>> Markup('Main &raquo; <em>About</em>').unescape()
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132 'Main » <em>About</em>'
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133 """
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134 from ._constants import HTML_ENTITIES
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135
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136 def handle_match(m):
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137 name = m.group(1)
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138 if name in HTML_ENTITIES:
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139 return unichr(HTML_ENTITIES[name])
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140 try:
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141 if name[:2] in ("#x", "#X"):
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142 return unichr(int(name[2:], 16))
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143 elif name.startswith("#"):
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144 return unichr(int(name[1:]))
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145 except ValueError:
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146 pass
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147 # Don't modify unexpected input.
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148 return m.group()
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149
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150 return _entity_re.sub(handle_match, text_type(self))
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151
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152 def striptags(self):
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153 """:meth:`unescape` the markup, remove tags, and normalize
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154 whitespace to single spaces.
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155
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156 >>> Markup('Main &raquo;\t<em>About</em>').striptags()
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157 'Main » About'
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158 """
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159 stripped = u" ".join(_striptags_re.sub("", self).split())
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160 return Markup(stripped).unescape()
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161
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162 @classmethod
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163 def escape(cls, s):
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164 """Escape a string. Calls :func:`escape` and ensures that for
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165 subclasses the correct type is returned.
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166 """
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167 rv = escape(s)
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168 if rv.__class__ is not cls:
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169 return cls(rv)
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170 return rv
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171
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172 def make_simple_escaping_wrapper(name): # noqa: B902
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173 orig = getattr(text_type, name)
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174
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175 def func(self, *args, **kwargs):
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176 args = _escape_argspec(list(args), enumerate(args), self.escape)
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177 _escape_argspec(kwargs, iteritems(kwargs), self.escape)
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178 return self.__class__(orig(self, *args, **kwargs))
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179
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180 func.__name__ = orig.__name__
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181 func.__doc__ = orig.__doc__
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182 return func
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183
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184 for method in (
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185 "__getitem__",
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186 "capitalize",
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187 "title",
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188 "lower",
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189 "upper",
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190 "replace",
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191 "ljust",
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192 "rjust",
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193 "lstrip",
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194 "rstrip",
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195 "center",
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196 "strip",
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197 "translate",
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198 "expandtabs",
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199 "swapcase",
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200 "zfill",
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201 ):
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202 locals()[method] = make_simple_escaping_wrapper(method)
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203
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204 def partition(self, sep):
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205 return tuple(map(self.__class__, text_type.partition(self, self.escape(sep))))
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206
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207 def rpartition(self, sep):
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208 return tuple(map(self.__class__, text_type.rpartition(self, self.escape(sep))))
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209
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210 def format(self, *args, **kwargs):
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211 formatter = EscapeFormatter(self.escape)
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212 kwargs = _MagicFormatMapping(args, kwargs)
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213 return self.__class__(formatter.vformat(self, args, kwargs))
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214
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215 def __html_format__(self, format_spec):
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216 if format_spec:
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217 raise ValueError("Unsupported format specification " "for Markup.")
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218 return self
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219
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220 # not in python 3
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221 if hasattr(text_type, "__getslice__"):
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222 __getslice__ = make_simple_escaping_wrapper("__getslice__")
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223
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224 del method, make_simple_escaping_wrapper
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225
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226
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227 class _MagicFormatMapping(Mapping):
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228 """This class implements a dummy wrapper to fix a bug in the Python
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229 standard library for string formatting.
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230
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231 See http://bugs.python.org/issue13598 for information about why
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232 this is necessary.
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233 """
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234
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235 def __init__(self, args, kwargs):
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236 self._args = args
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237 self._kwargs = kwargs
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238 self._last_index = 0
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239
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240 def __getitem__(self, key):
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241 if key == "":
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242 idx = self._last_index
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243 self._last_index += 1
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244 try:
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245 return self._args[idx]
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246 except LookupError:
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247 pass
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248 key = str(idx)
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249 return self._kwargs[key]
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250
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251 def __iter__(self):
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252 return iter(self._kwargs)
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253
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254 def __len__(self):
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255 return len(self._kwargs)
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256
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257
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258 if hasattr(text_type, "format"):
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259
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260 class EscapeFormatter(string.Formatter):
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261 def __init__(self, escape):
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262 self.escape = escape
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263
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264 def format_field(self, value, format_spec):
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265 if hasattr(value, "__html_format__"):
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266 rv = value.__html_format__(format_spec)
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267 elif hasattr(value, "__html__"):
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268 if format_spec:
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269 raise ValueError(
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270 "Format specifier {0} given, but {1} does not"
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271 " define __html_format__. A class that defines"
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272 " __html__ must define __html_format__ to work"
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273 " with format specifiers.".format(format_spec, type(value))
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274 )
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275 rv = value.__html__()
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276 else:
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277 # We need to make sure the format spec is unicode here as
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278 # otherwise the wrong callback methods are invoked. For
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279 # instance a byte string there would invoke __str__ and
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280 # not __unicode__.
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281 rv = string.Formatter.format_field(self, value, text_type(format_spec))
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282 return text_type(self.escape(rv))
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283
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284
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285 def _escape_argspec(obj, iterable, escape):
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286 """Helper for various string-wrapped functions."""
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287 for key, value in iterable:
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288 if hasattr(value, "__html__") or isinstance(value, string_types):
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289 obj[key] = escape(value)
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290 return obj
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291
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292
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293 class _MarkupEscapeHelper(object):
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294 """Helper for Markup.__mod__"""
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295
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296 def __init__(self, obj, escape):
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297 self.obj = obj
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298 self.escape = escape
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299
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300 def __getitem__(self, item):
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301 return _MarkupEscapeHelper(self.obj[item], self.escape)
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302
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303 def __str__(self):
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304 return text_type(self.escape(self.obj))
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305
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306 __unicode__ = __str__
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307
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308 def __repr__(self):
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309 return str(self.escape(repr(self.obj)))
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310
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311 def __int__(self):
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312 return int(self.obj)
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313
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314 def __float__(self):
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315 return float(self.obj)
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316
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317
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318 # we have to import it down here as the speedups and native
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319 # modules imports the markup type which is define above.
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320 try:
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321 from ._speedups import escape, escape_silent, soft_unicode
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322 except ImportError:
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323 from ._native import escape, escape_silent, soft_unicode
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324
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325 if not PY2:
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326 soft_str = soft_unicode
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327 __all__.append("soft_str")