Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/jinja2/utils.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 import json
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3 import os
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4 import re
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5 import warnings
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6 from collections import deque
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7 from random import choice
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8 from random import randrange
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9 from threading import Lock
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10
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11 from markupsafe import escape
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12 from markupsafe import Markup
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13
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14 from ._compat import abc
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15 from ._compat import string_types
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16 from ._compat import text_type
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17 from ._compat import url_quote
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18
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19 _word_split_re = re.compile(r"(\s+)")
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20 _punctuation_re = re.compile(
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21 "^(?P<lead>(?:%s)*)(?P<middle>.*?)(?P<trail>(?:%s)*)$"
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22 % (
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23 "|".join(map(re.escape, ("(", "<", "&lt;"))),
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24 "|".join(map(re.escape, (".", ",", ")", ">", "\n", "&gt;"))),
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25 )
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26 )
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27 _simple_email_re = re.compile(r"^\S+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9._-]+$")
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28 _striptags_re = re.compile(r"(<!--.*?-->|<[^>]*>)")
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29 _entity_re = re.compile(r"&([^;]+);")
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30 _letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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31 _digits = "0123456789"
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32
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33 # special singleton representing missing values for the runtime
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34 missing = type("MissingType", (), {"__repr__": lambda x: "missing"})()
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35
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36 # internal code
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37 internal_code = set()
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38
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39 concat = u"".join
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40
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41 _slash_escape = "\\/" not in json.dumps("/")
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42
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43
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44 def contextfunction(f):
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45 """This decorator can be used to mark a function or method context callable.
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46 A context callable is passed the active :class:`Context` as first argument when
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47 called from the template. This is useful if a function wants to get access
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48 to the context or functions provided on the context object. For example
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49 a function that returns a sorted list of template variables the current
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50 template exports could look like this::
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51
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52 @contextfunction
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53 def get_exported_names(context):
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54 return sorted(context.exported_vars)
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55 """
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56 f.contextfunction = True
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57 return f
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58
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59
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60 def evalcontextfunction(f):
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61 """This decorator can be used to mark a function or method as an eval
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62 context callable. This is similar to the :func:`contextfunction`
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63 but instead of passing the context, an evaluation context object is
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64 passed. For more information about the eval context, see
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65 :ref:`eval-context`.
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66
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67 .. versionadded:: 2.4
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68 """
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69 f.evalcontextfunction = True
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70 return f
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71
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72
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73 def environmentfunction(f):
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74 """This decorator can be used to mark a function or method as environment
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75 callable. This decorator works exactly like the :func:`contextfunction`
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76 decorator just that the first argument is the active :class:`Environment`
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77 and not context.
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78 """
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79 f.environmentfunction = True
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80 return f
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81
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82
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83 def internalcode(f):
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84 """Marks the function as internally used"""
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85 internal_code.add(f.__code__)
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86 return f
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87
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88
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89 def is_undefined(obj):
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90 """Check if the object passed is undefined. This does nothing more than
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91 performing an instance check against :class:`Undefined` but looks nicer.
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92 This can be used for custom filters or tests that want to react to
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93 undefined variables. For example a custom default filter can look like
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94 this::
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95
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96 def default(var, default=''):
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97 if is_undefined(var):
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98 return default
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99 return var
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100 """
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101 from .runtime import Undefined
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102
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103 return isinstance(obj, Undefined)
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104
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105
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106 def consume(iterable):
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107 """Consumes an iterable without doing anything with it."""
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108 for _ in iterable:
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109 pass
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110
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111
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112 def clear_caches():
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113 """Jinja keeps internal caches for environments and lexers. These are
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114 used so that Jinja doesn't have to recreate environments and lexers all
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115 the time. Normally you don't have to care about that but if you are
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116 measuring memory consumption you may want to clean the caches.
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117 """
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118 from .environment import _spontaneous_environments
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119 from .lexer import _lexer_cache
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120
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121 _spontaneous_environments.clear()
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122 _lexer_cache.clear()
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123
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124
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125 def import_string(import_name, silent=False):
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126 """Imports an object based on a string. This is useful if you want to
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127 use import paths as endpoints or something similar. An import path can
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128 be specified either in dotted notation (``xml.sax.saxutils.escape``)
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129 or with a colon as object delimiter (``xml.sax.saxutils:escape``).
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130
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131 If the `silent` is True the return value will be `None` if the import
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132 fails.
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133
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134 :return: imported object
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135 """
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136 try:
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137 if ":" in import_name:
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138 module, obj = import_name.split(":", 1)
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139 elif "." in import_name:
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140 module, _, obj = import_name.rpartition(".")
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141 else:
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142 return __import__(import_name)
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143 return getattr(__import__(module, None, None, [obj]), obj)
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144 except (ImportError, AttributeError):
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145 if not silent:
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146 raise
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147
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148
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149 def open_if_exists(filename, mode="rb"):
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150 """Returns a file descriptor for the filename if that file exists,
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151 otherwise ``None``.
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152 """
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153 if not os.path.isfile(filename):
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154 return None
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155
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156 return open(filename, mode)
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157
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158
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159 def object_type_repr(obj):
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160 """Returns the name of the object's type. For some recognized
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161 singletons the name of the object is returned instead. (For
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162 example for `None` and `Ellipsis`).
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163 """
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164 if obj is None:
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165 return "None"
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166 elif obj is Ellipsis:
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167 return "Ellipsis"
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168
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169 cls = type(obj)
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170
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171 # __builtin__ in 2.x, builtins in 3.x
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172 if cls.__module__ in ("__builtin__", "builtins"):
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173 name = cls.__name__
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174 else:
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175 name = cls.__module__ + "." + cls.__name__
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176
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177 return "%s object" % name
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178
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179
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180 def pformat(obj, verbose=False):
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181 """Prettyprint an object. Either use the `pretty` library or the
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182 builtin `pprint`.
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183 """
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184 try:
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185 from pretty import pretty
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186
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187 return pretty(obj, verbose=verbose)
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188 except ImportError:
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189 from pprint import pformat
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190
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191 return pformat(obj)
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192
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193
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194 def urlize(text, trim_url_limit=None, rel=None, target=None):
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195 """Converts any URLs in text into clickable links. Works on http://,
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196 https:// and www. links. Links can have trailing punctuation (periods,
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197 commas, close-parens) and leading punctuation (opening parens) and
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198 it'll still do the right thing.
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199
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200 If trim_url_limit is not None, the URLs in link text will be limited
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201 to trim_url_limit characters.
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202
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203 If nofollow is True, the URLs in link text will get a rel="nofollow"
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204 attribute.
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205
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206 If target is not None, a target attribute will be added to the link.
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207 """
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208 trim_url = (
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209 lambda x, limit=trim_url_limit: limit is not None
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210 and (x[:limit] + (len(x) >= limit and "..." or ""))
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211 or x
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212 )
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213 words = _word_split_re.split(text_type(escape(text)))
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214 rel_attr = rel and ' rel="%s"' % text_type(escape(rel)) or ""
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215 target_attr = target and ' target="%s"' % escape(target) or ""
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216
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217 for i, word in enumerate(words):
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218 match = _punctuation_re.match(word)
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219 if match:
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220 lead, middle, trail = match.groups()
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221 if middle.startswith("www.") or (
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222 "@" not in middle
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223 and not middle.startswith("http://")
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224 and not middle.startswith("https://")
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225 and len(middle) > 0
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226 and middle[0] in _letters + _digits
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227 and (
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228 middle.endswith(".org")
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229 or middle.endswith(".net")
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230 or middle.endswith(".com")
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231 )
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232 ):
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233 middle = '<a href="http://%s"%s%s>%s</a>' % (
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234 middle,
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235 rel_attr,
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236 target_attr,
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237 trim_url(middle),
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238 )
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239 if middle.startswith("http://") or middle.startswith("https://"):
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240 middle = '<a href="%s"%s%s>%s</a>' % (
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241 middle,
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242 rel_attr,
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243 target_attr,
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244 trim_url(middle),
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245 )
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246 if (
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247 "@" in middle
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248 and not middle.startswith("www.")
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249 and ":" not in middle
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250 and _simple_email_re.match(middle)
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251 ):
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252 middle = '<a href="mailto:%s">%s</a>' % (middle, middle)
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253 if lead + middle + trail != word:
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254 words[i] = lead + middle + trail
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255 return u"".join(words)
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256
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257
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258 def generate_lorem_ipsum(n=5, html=True, min=20, max=100):
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259 """Generate some lorem ipsum for the template."""
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260 from .constants import LOREM_IPSUM_WORDS
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261
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262 words = LOREM_IPSUM_WORDS.split()
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263 result = []
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264
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265 for _ in range(n):
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266 next_capitalized = True
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267 last_comma = last_fullstop = 0
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268 word = None
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269 last = None
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270 p = []
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271
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272 # each paragraph contains out of 20 to 100 words.
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273 for idx, _ in enumerate(range(randrange(min, max))):
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274 while True:
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275 word = choice(words)
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276 if word != last:
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277 last = word
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278 break
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279 if next_capitalized:
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280 word = word.capitalize()
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281 next_capitalized = False
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282 # add commas
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283 if idx - randrange(3, 8) > last_comma:
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284 last_comma = idx
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285 last_fullstop += 2
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286 word += ","
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287 # add end of sentences
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288 if idx - randrange(10, 20) > last_fullstop:
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289 last_comma = last_fullstop = idx
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290 word += "."
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291 next_capitalized = True
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292 p.append(word)
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293
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294 # ensure that the paragraph ends with a dot.
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295 p = u" ".join(p)
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296 if p.endswith(","):
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297 p = p[:-1] + "."
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298 elif not p.endswith("."):
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299 p += "."
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300 result.append(p)
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301
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302 if not html:
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303 return u"\n\n".join(result)
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304 return Markup(u"\n".join(u"<p>%s</p>" % escape(x) for x in result))
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305
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306
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307 def unicode_urlencode(obj, charset="utf-8", for_qs=False):
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308 """Quote a string for use in a URL using the given charset.
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309
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310 This function is misnamed, it is a wrapper around
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311 :func:`urllib.parse.quote`.
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312
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313 :param obj: String or bytes to quote. Other types are converted to
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314 string then encoded to bytes using the given charset.
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315 :param charset: Encode text to bytes using this charset.
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316 :param for_qs: Quote "/" and use "+" for spaces.
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317 """
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318 if not isinstance(obj, string_types):
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319 obj = text_type(obj)
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320
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321 if isinstance(obj, text_type):
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322 obj = obj.encode(charset)
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323
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324 safe = b"" if for_qs else b"/"
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325 rv = url_quote(obj, safe)
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326
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327 if not isinstance(rv, text_type):
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328 rv = rv.decode("utf-8")
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329
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330 if for_qs:
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331 rv = rv.replace("%20", "+")
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332
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333 return rv
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334
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335
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336 class LRUCache(object):
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337 """A simple LRU Cache implementation."""
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338
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339 # this is fast for small capacities (something below 1000) but doesn't
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340 # scale. But as long as it's only used as storage for templates this
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341 # won't do any harm.
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342
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343 def __init__(self, capacity):
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344 self.capacity = capacity
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345 self._mapping = {}
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346 self._queue = deque()
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347 self._postinit()
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348
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349 def _postinit(self):
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350 # alias all queue methods for faster lookup
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351 self._popleft = self._queue.popleft
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352 self._pop = self._queue.pop
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353 self._remove = self._queue.remove
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354 self._wlock = Lock()
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355 self._append = self._queue.append
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356
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357 def __getstate__(self):
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358 return {
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359 "capacity": self.capacity,
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360 "_mapping": self._mapping,
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361 "_queue": self._queue,
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362 }
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363
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364 def __setstate__(self, d):
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365 self.__dict__.update(d)
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366 self._postinit()
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367
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368 def __getnewargs__(self):
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369 return (self.capacity,)
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370
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371 def copy(self):
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372 """Return a shallow copy of the instance."""
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373 rv = self.__class__(self.capacity)
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374 rv._mapping.update(self._mapping)
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375 rv._queue.extend(self._queue)
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376 return rv
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377
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378 def get(self, key, default=None):
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379 """Return an item from the cache dict or `default`"""
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380 try:
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381 return self[key]
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382 except KeyError:
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383 return default
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384
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385 def setdefault(self, key, default=None):
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386 """Set `default` if the key is not in the cache otherwise
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387 leave unchanged. Return the value of this key.
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388 """
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389 try:
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390 return self[key]
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parents:
diff changeset
391 except KeyError:
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diff changeset
392 self[key] = default
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
393 return default
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
394
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parents:
diff changeset
395 def clear(self):
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parents:
diff changeset
396 """Clear the cache."""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
397 self._wlock.acquire()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
398 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
399 self._mapping.clear()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
400 self._queue.clear()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
401 finally:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
402 self._wlock.release()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
403
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guerler
parents:
diff changeset
404 def __contains__(self, key):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
405 """Check if a key exists in this cache."""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
406 return key in self._mapping
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
407
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parents:
diff changeset
408 def __len__(self):
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guerler
parents:
diff changeset
409 """Return the current size of the cache."""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
410 return len(self._mapping)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
411
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parents:
diff changeset
412 def __repr__(self):
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diff changeset
413 return "<%s %r>" % (self.__class__.__name__, self._mapping)
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guerler
parents:
diff changeset
414
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parents:
diff changeset
415 def __getitem__(self, key):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
416 """Get an item from the cache. Moves the item up so that it has the
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
417 highest priority then.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
418
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diff changeset
419 Raise a `KeyError` if it does not exist.
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guerler
parents:
diff changeset
420 """
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parents:
diff changeset
421 self._wlock.acquire()
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parents:
diff changeset
422 try:
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423 rv = self._mapping[key]
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parents:
diff changeset
424 if self._queue[-1] != key:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
425 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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426 self._remove(key)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
427 except ValueError:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
428 # if something removed the key from the container
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
429 # when we read, ignore the ValueError that we would
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guerler
parents:
diff changeset
430 # get otherwise.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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431 pass
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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432 self._append(key)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
433 return rv
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
434 finally:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
435 self._wlock.release()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
436
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
437 def __setitem__(self, key, value):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
438 """Sets the value for an item. Moves the item up so that it
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
439 has the highest priority then.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
440 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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441 self._wlock.acquire()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
442 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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443 if key in self._mapping:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
444 self._remove(key)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
445 elif len(self._mapping) == self.capacity:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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446 del self._mapping[self._popleft()]
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
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447 self._append(key)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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448 self._mapping[key] = value
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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449 finally:
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450 self._wlock.release()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
451
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
452 def __delitem__(self, key):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
453 """Remove an item from the cache dict.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
454 Raise a `KeyError` if it does not exist.
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guerler
parents:
diff changeset
455 """
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456 self._wlock.acquire()
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diff changeset
457 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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458 del self._mapping[key]
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
459 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
460 self._remove(key)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
461 except ValueError:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
462 pass
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
463 finally:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
464 self._wlock.release()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
465
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
466 def items(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
467 """Return a list of items."""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
468 result = [(key, self._mapping[key]) for key in list(self._queue)]
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
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diff changeset
469 result.reverse()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
470 return result
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
471
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
472 def iteritems(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
473 """Iterate over all items."""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
474 warnings.warn(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
475 "'iteritems()' will be removed in version 3.0. Use"
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
476 " 'iter(cache.items())' instead.",
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
477 DeprecationWarning,
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
478 stacklevel=2,
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
479 )
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
480 return iter(self.items())
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
481
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
482 def values(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
483 """Return a list of all values."""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
484 return [x[1] for x in self.items()]
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
485
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
486 def itervalue(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
487 """Iterate over all values."""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
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diff changeset
488 warnings.warn(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
489 "'itervalue()' will be removed in version 3.0. Use"
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
490 " 'iter(cache.values())' instead.",
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
491 DeprecationWarning,
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
492 stacklevel=2,
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
493 )
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
494 return iter(self.values())
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
495
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
496 def itervalues(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
497 """Iterate over all values."""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
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diff changeset
498 warnings.warn(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
499 "'itervalues()' will be removed in version 3.0. Use"
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
500 " 'iter(cache.values())' instead.",
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
501 DeprecationWarning,
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
502 stacklevel=2,
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
503 )
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
504 return iter(self.values())
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
505
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
506 def keys(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
507 """Return a list of all keys ordered by most recent usage."""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
508 return list(self)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
509
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
510 def iterkeys(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
511 """Iterate over all keys in the cache dict, ordered by
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
512 the most recent usage.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
513 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
514 warnings.warn(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
515 "'iterkeys()' will be removed in version 3.0. Use"
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
516 " 'iter(cache.keys())' instead.",
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
517 DeprecationWarning,
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
518 stacklevel=2,
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
519 )
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
520 return iter(self)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
521
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
522 def __iter__(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
523 return reversed(tuple(self._queue))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
524
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525 def __reversed__(self):
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526 """Iterate over the keys in the cache dict, oldest items
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527 coming first.
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528 """
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529 return iter(tuple(self._queue))
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530
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531 __copy__ = copy
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532
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533
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534 abc.MutableMapping.register(LRUCache)
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535
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536
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537 def select_autoescape(
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538 enabled_extensions=("html", "htm", "xml"),
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539 disabled_extensions=(),
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540 default_for_string=True,
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541 default=False,
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542 ):
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543 """Intelligently sets the initial value of autoescaping based on the
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544 filename of the template. This is the recommended way to configure
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545 autoescaping if you do not want to write a custom function yourself.
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546
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547 If you want to enable it for all templates created from strings or
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548 for all templates with `.html` and `.xml` extensions::
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549
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550 from jinja2 import Environment, select_autoescape
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551 env = Environment(autoescape=select_autoescape(
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552 enabled_extensions=('html', 'xml'),
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553 default_for_string=True,
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554 ))
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555
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556 Example configuration to turn it on at all times except if the template
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557 ends with `.txt`::
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558
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559 from jinja2 import Environment, select_autoescape
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560 env = Environment(autoescape=select_autoescape(
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561 disabled_extensions=('txt',),
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562 default_for_string=True,
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563 default=True,
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564 ))
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565
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566 The `enabled_extensions` is an iterable of all the extensions that
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567 autoescaping should be enabled for. Likewise `disabled_extensions` is
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568 a list of all templates it should be disabled for. If a template is
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569 loaded from a string then the default from `default_for_string` is used.
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570 If nothing matches then the initial value of autoescaping is set to the
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571 value of `default`.
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572
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573 For security reasons this function operates case insensitive.
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574
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575 .. versionadded:: 2.9
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576 """
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577 enabled_patterns = tuple("." + x.lstrip(".").lower() for x in enabled_extensions)
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578 disabled_patterns = tuple("." + x.lstrip(".").lower() for x in disabled_extensions)
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579
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580 def autoescape(template_name):
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581 if template_name is None:
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582 return default_for_string
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583 template_name = template_name.lower()
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584 if template_name.endswith(enabled_patterns):
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585 return True
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586 if template_name.endswith(disabled_patterns):
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587 return False
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588 return default
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589
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590 return autoescape
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591
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592
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593 def htmlsafe_json_dumps(obj, dumper=None, **kwargs):
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594 """Works exactly like :func:`dumps` but is safe for use in ``<script>``
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595 tags. It accepts the same arguments and returns a JSON string. Note that
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596 this is available in templates through the ``|tojson`` filter which will
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597 also mark the result as safe. Due to how this function escapes certain
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598 characters this is safe even if used outside of ``<script>`` tags.
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599
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600 The following characters are escaped in strings:
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601
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602 - ``<``
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603 - ``>``
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604 - ``&``
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605 - ``'``
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606
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607 This makes it safe to embed such strings in any place in HTML with the
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608 notable exception of double quoted attributes. In that case single
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609 quote your attributes or HTML escape it in addition.
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610 """
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611 if dumper is None:
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612 dumper = json.dumps
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613 rv = (
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614 dumper(obj, **kwargs)
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615 .replace(u"<", u"\\u003c")
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616 .replace(u">", u"\\u003e")
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617 .replace(u"&", u"\\u0026")
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618 .replace(u"'", u"\\u0027")
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619 )
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620 return Markup(rv)
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621
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622
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623 class Cycler(object):
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624 """Cycle through values by yield them one at a time, then restarting
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625 once the end is reached. Available as ``cycler`` in templates.
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626
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627 Similar to ``loop.cycle``, but can be used outside loops or across
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628 multiple loops. For example, render a list of folders and files in a
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629 list, alternating giving them "odd" and "even" classes.
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630
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631 .. code-block:: html+jinja
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632
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633 {% set row_class = cycler("odd", "even") %}
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634 <ul class="browser">
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635 {% for folder in folders %}
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636 <li class="folder {{ row_class.next() }}">{{ folder }}
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637 {% endfor %}
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638 {% for file in files %}
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639 <li class="file {{ row_class.next() }}">{{ file }}
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640 {% endfor %}
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641 </ul>
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642
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643 :param items: Each positional argument will be yielded in the order
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644 given for each cycle.
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645
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646 .. versionadded:: 2.1
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647 """
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648
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649 def __init__(self, *items):
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650 if not items:
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651 raise RuntimeError("at least one item has to be provided")
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652 self.items = items
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653 self.pos = 0
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654
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655 def reset(self):
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656 """Resets the current item to the first item."""
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657 self.pos = 0
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658
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659 @property
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660 def current(self):
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661 """Return the current item. Equivalent to the item that will be
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662 returned next time :meth:`next` is called.
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663 """
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664 return self.items[self.pos]
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665
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666 def next(self):
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667 """Return the current item, then advance :attr:`current` to the
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668 next item.
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669 """
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670 rv = self.current
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671 self.pos = (self.pos + 1) % len(self.items)
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672 return rv
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673
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674 __next__ = next
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675
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676
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677 class Joiner(object):
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678 """A joining helper for templates."""
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679
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680 def __init__(self, sep=u", "):
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681 self.sep = sep
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682 self.used = False
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683
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684 def __call__(self):
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685 if not self.used:
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686 self.used = True
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687 return u""
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688 return self.sep
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689
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690
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691 class Namespace(object):
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692 """A namespace object that can hold arbitrary attributes. It may be
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693 initialized from a dictionary or with keyword arguments."""
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694
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695 def __init__(*args, **kwargs): # noqa: B902
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696 self, args = args[0], args[1:]
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697 self.__attrs = dict(*args, **kwargs)
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698
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699 def __getattribute__(self, name):
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700 # __class__ is needed for the awaitable check in async mode
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701 if name in {"_Namespace__attrs", "__class__"}:
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702 return object.__getattribute__(self, name)
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703 try:
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704 return self.__attrs[name]
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705 except KeyError:
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706 raise AttributeError(name)
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707
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708 def __setitem__(self, name, value):
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709 self.__attrs[name] = value
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710
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711 def __repr__(self):
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712 return "<Namespace %r>" % self.__attrs
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713
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714
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715 # does this python version support async for in and async generators?
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716 try:
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717 exec("async def _():\n async for _ in ():\n yield _")
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718 have_async_gen = True
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719 except SyntaxError:
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720 have_async_gen = False
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721
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722
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723 def soft_unicode(s):
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724 from markupsafe import soft_unicode
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725
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726 warnings.warn(
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727 "'jinja2.utils.soft_unicode' will be removed in version 3.0."
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728 " Use 'markupsafe.soft_unicode' instead.",
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729 DeprecationWarning,
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730 stacklevel=2,
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731 )
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732 return soft_unicode(s)