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annotate env/lib/python3.7/site-packages/docutils/__init__.py @ 3:758bc20232e8 draft

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"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:20:52 -0400
parents 26e78fe6e8c4
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1 # $Id: __init__.py 8453 2020-01-12 13:28:32Z grubert $
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2 # Author: David Goodger <goodger@python.org>
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3 # Copyright: This module has been placed in the public domain.
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4
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5 """
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6 This is the Docutils (Python Documentation Utilities) package.
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7
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8 Package Structure
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9 =================
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10
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11 Modules:
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12
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13 - __init__.py: Contains component base classes, exception classes, and
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14 Docutils version information.
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15
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16 - core.py: Contains the ``Publisher`` class and ``publish_*()`` convenience
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17 functions.
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18
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19 - frontend.py: Runtime settings (command-line interface, configuration files)
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20 processing, for Docutils front-ends.
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21
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22 - io.py: Provides a uniform API for low-level input and output.
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23
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24 - nodes.py: Docutils document tree (doctree) node class library.
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25
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26 - statemachine.py: A finite state machine specialized for
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27 regular-expression-based text filters.
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28
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29 Subpackages:
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30
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31 - languages: Language-specific mappings of terms.
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32
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33 - parsers: Syntax-specific input parser modules or packages.
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34
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35 - readers: Context-specific input handlers which understand the data
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36 source and manage a parser.
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37
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38 - transforms: Modules used by readers and writers to modify DPS
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39 doctrees.
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40
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41 - utils: Contains the ``Reporter`` system warning class and miscellaneous
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42 utilities used by readers, writers, and transforms.
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43
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44 utils/urischemes.py: Contains a complete mapping of known URI addressing
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45 scheme names to descriptions.
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46
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47 - utils/math: Contains functions for conversion of mathematical notation
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48 between different formats (LaTeX, MathML, text, ...).
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49
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50 - writers: Format-specific output translators.
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51 """
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52
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53 import sys
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54 from collections import namedtuple
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55
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56
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57 __docformat__ = 'reStructuredText'
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58
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59 __version__ = '0.16'
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60 """Docutils version identifier (complies with PEP 440)::
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61
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62 major.minor[.micro][releaselevel[serial]][.dev]
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63
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64 For version comparison operations, use `__version_info__` (see, below)
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65 rather than parsing the text of `__version__`.
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66
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67 See 'Version Numbering' in docs/dev/policies.txt.
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68 """
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69
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70 VersionInfo = namedtuple(
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71 'VersionInfo', 'major minor micro releaselevel serial release')
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72
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73 __version_info__ = VersionInfo(
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74 major=0,
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75 minor=16,
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76 micro=0,
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77 releaselevel='final', # one of 'alpha', 'beta', 'candidate', 'final'
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78 # pre-release serial number (0 for final releases and active development):
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79 serial=0,
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80 release=True # True for official releases and pre-releases
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81 )
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82 """Comprehensive version information tuple. See 'Version Numbering' in
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83 docs/dev/policies.txt."""
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84
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85 __version_details__ = 'release'
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86 """Optional extra version details (e.g. 'snapshot 2005-05-29, r3410').
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87 (For development and release status see `__version_info__`.)
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88 """
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89
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90
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91 class ApplicationError(Exception): pass
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92
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93 class DataError(ApplicationError): pass
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94
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95
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96 class SettingsSpec(object):
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97
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98 """
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99 Runtime setting specification base class.
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100
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101 SettingsSpec subclass objects used by `docutils.frontend.OptionParser`.
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102 """
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103
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104 settings_spec = ()
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105 """Runtime settings specification. Override in subclasses.
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106
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107 Defines runtime settings and associated command-line options, as used by
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108 `docutils.frontend.OptionParser`. This is a tuple of:
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109
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110 - Option group title (string or `None` which implies no group, just a list
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111 of single options).
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112
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113 - Description (string or `None`).
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114
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115 - A sequence of option tuples. Each consists of:
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116
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117 - Help text (string)
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118
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119 - List of option strings (e.g. ``['-Q', '--quux']``).
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120
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121 - Dictionary of keyword arguments sent to the OptionParser/OptionGroup
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122 ``add_option`` method.
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123
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124 Runtime setting names are derived implicitly from long option names
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125 ('--a-setting' becomes ``settings.a_setting``) or explicitly from the
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126 'dest' keyword argument.
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127
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128 Most settings will also have a 'validator' keyword & function. The
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129 validator function validates setting values (from configuration files
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130 and command-line option arguments) and converts them to appropriate
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131 types. For example, the ``docutils.frontend.validate_boolean``
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132 function, **required by all boolean settings**, converts true values
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133 ('1', 'on', 'yes', and 'true') to 1 and false values ('0', 'off',
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134 'no', 'false', and '') to 0. Validators need only be set once per
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135 setting. See the `docutils.frontend.validate_*` functions.
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136
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137 See the optparse docs for more details.
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138
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139 - More triples of group title, description, options, as many times as
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140 needed. Thus, `settings_spec` tuples can be simply concatenated.
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141 """
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142
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143 settings_defaults = None
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144 """A dictionary of defaults for settings not in `settings_spec` (internal
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145 settings, intended to be inaccessible by command-line and config file).
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146 Override in subclasses."""
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147
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148 settings_default_overrides = None
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149 """A dictionary of auxiliary defaults, to override defaults for settings
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150 defined in other components. Override in subclasses."""
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151
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152 relative_path_settings = ()
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153 """Settings containing filesystem paths. Override in subclasses.
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154 Settings listed here are to be interpreted relative to the current working
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155 directory."""
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156
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157 config_section = None
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158 """The name of the config file section specific to this component
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159 (lowercase, no brackets). Override in subclasses."""
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160
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161 config_section_dependencies = None
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162 """A list of names of config file sections that are to be applied before
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163 `config_section`, in order (from general to specific). In other words,
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164 the settings in `config_section` are to be overlaid on top of the settings
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165 from these sections. The "general" section is assumed implicitly.
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166 Override in subclasses."""
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167
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168
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169 class TransformSpec:
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170
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171 """
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172 Runtime transform specification base class.
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173
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174 TransformSpec subclass objects used by `docutils.transforms.Transformer`.
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175 """
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176
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177 def get_transforms(self):
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178 """Transforms required by this class. Override in subclasses."""
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179 if self.default_transforms != ():
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180 import warnings
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181 warnings.warn('default_transforms attribute deprecated.\n'
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182 'Use get_transforms() method instead.',
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183 DeprecationWarning)
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184 return list(self.default_transforms)
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185 return []
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186
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187 # Deprecated; for compatibility.
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188 default_transforms = ()
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189
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190 unknown_reference_resolvers = ()
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191 """List of functions to try to resolve unknown references. Unknown
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192 references have a 'refname' attribute which doesn't correspond to any
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193 target in the document. Called when the transforms in
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194 `docutils.tranforms.references` are unable to find a correct target. The
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195 list should contain functions which will try to resolve unknown
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196 references, with the following signature::
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197
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198 def reference_resolver(node):
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199 '''Returns boolean: true if resolved, false if not.'''
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200
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201 If the function is able to resolve the reference, it should also remove
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202 the 'refname' attribute and mark the node as resolved::
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203
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204 del node['refname']
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205 node.resolved = 1
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206
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207 Each function must have a "priority" attribute which will affect the order
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208 the unknown_reference_resolvers are run::
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209
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210 reference_resolver.priority = 100
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211
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212 Override in subclasses."""
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213
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214
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215 class Component(SettingsSpec, TransformSpec):
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216
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217 """Base class for Docutils components."""
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218
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219 component_type = None
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220 """Name of the component type ('reader', 'parser', 'writer'). Override in
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221 subclasses."""
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222
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223 supported = ()
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224 """Names for this component. Override in subclasses."""
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225
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226 def supports(self, format):
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227 """
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228 Is `format` supported by this component?
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229
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230 To be used by transforms to ask the dependent component if it supports
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231 a certain input context or output format.
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232 """
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233 return format in self.supported