Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/ruamel/yaml/resolver.py @ 2:6af9afd405e9 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
"planemo upload commit 0a63dd5f4d38a1f6944587f52a8cd79874177fc1"
author shellac
date Thu, 14 May 2020 14:56:58 -0400
parents 26e78fe6e8c4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 # coding: utf-8
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2
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3 from __future__ import absolute_import
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4
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5 import re
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6
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7 if False: # MYPY
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8 from typing import Any, Dict, List, Union, Text, Optional # NOQA
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9 from ruamel.yaml.compat import VersionType # NOQA
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10
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11 from ruamel.yaml.compat import string_types, _DEFAULT_YAML_VERSION # NOQA
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12 from ruamel.yaml.error import * # NOQA
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13 from ruamel.yaml.nodes import MappingNode, ScalarNode, SequenceNode # NOQA
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14 from ruamel.yaml.util import RegExp # NOQA
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15
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16 __all__ = ['BaseResolver', 'Resolver', 'VersionedResolver']
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17
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18
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19 # fmt: off
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20 # resolvers consist of
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21 # - a list of applicable version
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22 # - a tag
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23 # - a regexp
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24 # - a list of first characters to match
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25 implicit_resolvers = [
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26 ([(1, 2)],
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27 u'tag:yaml.org,2002:bool',
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28 RegExp(u'''^(?:true|True|TRUE|false|False|FALSE)$''', re.X),
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29 list(u'tTfF')),
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30 ([(1, 1)],
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31 u'tag:yaml.org,2002:bool',
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32 RegExp(u'''^(?:y|Y|yes|Yes|YES|n|N|no|No|NO
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33 |true|True|TRUE|false|False|FALSE
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34 |on|On|ON|off|Off|OFF)$''', re.X),
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35 list(u'yYnNtTfFoO')),
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36 ([(1, 2)],
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37 u'tag:yaml.org,2002:float',
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38 RegExp(u'''^(?:
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39 [-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+]?[0-9]+)?
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40 |[-+]?(?:[0-9][0-9_]*)(?:[eE][-+]?[0-9]+)
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41 |[-+]?\\.[0-9_]+(?:[eE][-+][0-9]+)?
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42 |[-+]?\\.(?:inf|Inf|INF)
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43 |\\.(?:nan|NaN|NAN))$''', re.X),
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44 list(u'-+0123456789.')),
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45 ([(1, 1)],
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46 u'tag:yaml.org,2002:float',
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47 RegExp(u'''^(?:
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48 [-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+]?[0-9]+)?
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49 |[-+]?(?:[0-9][0-9_]*)(?:[eE][-+]?[0-9]+)
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50 |\\.[0-9_]+(?:[eE][-+][0-9]+)?
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51 |[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]* # sexagesimal float
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52 |[-+]?\\.(?:inf|Inf|INF)
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53 |\\.(?:nan|NaN|NAN))$''', re.X),
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54 list(u'-+0123456789.')),
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55 ([(1, 2)],
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56 u'tag:yaml.org,2002:int',
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57 RegExp(u'''^(?:[-+]?0b[0-1_]+
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58 |[-+]?0o?[0-7_]+
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59 |[-+]?[0-9_]+
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60 |[-+]?0x[0-9a-fA-F_]+)$''', re.X),
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61 list(u'-+0123456789')),
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62 ([(1, 1)],
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63 u'tag:yaml.org,2002:int',
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64 RegExp(u'''^(?:[-+]?0b[0-1_]+
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65 |[-+]?0?[0-7_]+
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66 |[-+]?(?:0|[1-9][0-9_]*)
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67 |[-+]?0x[0-9a-fA-F_]+
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68 |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X), # sexagesimal int
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69 list(u'-+0123456789')),
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70 ([(1, 2), (1, 1)],
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71 u'tag:yaml.org,2002:merge',
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72 RegExp(u'^(?:<<)$'),
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73 [u'<']),
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74 ([(1, 2), (1, 1)],
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75 u'tag:yaml.org,2002:null',
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76 RegExp(u'''^(?: ~
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77 |null|Null|NULL
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78 | )$''', re.X),
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79 [u'~', u'n', u'N', u'']),
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80 ([(1, 2), (1, 1)],
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81 u'tag:yaml.org,2002:timestamp',
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82 RegExp(u'''^(?:[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]
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83 |[0-9][0-9][0-9][0-9] -[0-9][0-9]? -[0-9][0-9]?
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84 (?:[Tt]|[ \\t]+)[0-9][0-9]?
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85 :[0-9][0-9] :[0-9][0-9] (?:\\.[0-9]*)?
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86 (?:[ \\t]*(?:Z|[-+][0-9][0-9]?(?::[0-9][0-9])?))?)$''', re.X),
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87 list(u'0123456789')),
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88 ([(1, 2), (1, 1)],
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89 u'tag:yaml.org,2002:value',
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90 RegExp(u'^(?:=)$'),
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91 [u'=']),
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92 # The following resolver is only for documentation purposes. It cannot work
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93 # because plain scalars cannot start with '!', '&', or '*'.
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94 ([(1, 2), (1, 1)],
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95 u'tag:yaml.org,2002:yaml',
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96 RegExp(u'^(?:!|&|\\*)$'),
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97 list(u'!&*')),
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98 ]
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99 # fmt: on
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100
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101
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102 class ResolverError(YAMLError):
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103 pass
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104
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105
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106 class BaseResolver(object):
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107
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108 DEFAULT_SCALAR_TAG = u'tag:yaml.org,2002:str'
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109 DEFAULT_SEQUENCE_TAG = u'tag:yaml.org,2002:seq'
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110 DEFAULT_MAPPING_TAG = u'tag:yaml.org,2002:map'
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111
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112 yaml_implicit_resolvers = {} # type: Dict[Any, Any]
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113 yaml_path_resolvers = {} # type: Dict[Any, Any]
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114
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115 def __init__(self, loadumper=None):
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116 # type: (Any, Any) -> None
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117 self.loadumper = loadumper
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118 if self.loadumper is not None and getattr(self.loadumper, '_resolver', None) is None:
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119 self.loadumper._resolver = self.loadumper
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120 self._loader_version = None # type: Any
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121 self.resolver_exact_paths = [] # type: List[Any]
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122 self.resolver_prefix_paths = [] # type: List[Any]
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123
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124 @property
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125 def parser(self):
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126 # type: () -> Any
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127 if self.loadumper is not None:
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128 if hasattr(self.loadumper, 'typ'):
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129 return self.loadumper.parser
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130 return self.loadumper._parser
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131 return None
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132
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133 @classmethod
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134 def add_implicit_resolver_base(cls, tag, regexp, first):
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135 # type: (Any, Any, Any) -> None
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136 if 'yaml_implicit_resolvers' not in cls.__dict__:
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137 # deepcopy doesn't work here
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138 cls.yaml_implicit_resolvers = dict(
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139 (k, cls.yaml_implicit_resolvers[k][:]) for k in cls.yaml_implicit_resolvers
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140 )
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141 if first is None:
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142 first = [None]
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143 for ch in first:
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144 cls.yaml_implicit_resolvers.setdefault(ch, []).append((tag, regexp))
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145
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146 @classmethod
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147 def add_implicit_resolver(cls, tag, regexp, first):
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148 # type: (Any, Any, Any) -> None
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149 if 'yaml_implicit_resolvers' not in cls.__dict__:
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150 # deepcopy doesn't work here
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151 cls.yaml_implicit_resolvers = dict(
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152 (k, cls.yaml_implicit_resolvers[k][:]) for k in cls.yaml_implicit_resolvers
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153 )
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154 if first is None:
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155 first = [None]
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156 for ch in first:
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157 cls.yaml_implicit_resolvers.setdefault(ch, []).append((tag, regexp))
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158 implicit_resolvers.append(([(1, 2), (1, 1)], tag, regexp, first))
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159
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160 # @classmethod
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161 # def add_implicit_resolver(cls, tag, regexp, first):
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162
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163 @classmethod
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164 def add_path_resolver(cls, tag, path, kind=None):
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165 # type: (Any, Any, Any) -> None
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166 # Note: `add_path_resolver` is experimental. The API could be changed.
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167 # `new_path` is a pattern that is matched against the path from the
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168 # root to the node that is being considered. `node_path` elements are
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169 # tuples `(node_check, index_check)`. `node_check` is a node class:
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170 # `ScalarNode`, `SequenceNode`, `MappingNode` or `None`. `None`
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171 # matches any kind of a node. `index_check` could be `None`, a boolean
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172 # value, a string value, or a number. `None` and `False` match against
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173 # any _value_ of sequence and mapping nodes. `True` matches against
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174 # any _key_ of a mapping node. A string `index_check` matches against
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175 # a mapping value that corresponds to a scalar key which content is
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176 # equal to the `index_check` value. An integer `index_check` matches
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177 # against a sequence value with the index equal to `index_check`.
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178 if 'yaml_path_resolvers' not in cls.__dict__:
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179 cls.yaml_path_resolvers = cls.yaml_path_resolvers.copy()
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180 new_path = [] # type: List[Any]
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181 for element in path:
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182 if isinstance(element, (list, tuple)):
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183 if len(element) == 2:
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184 node_check, index_check = element
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185 elif len(element) == 1:
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186 node_check = element[0]
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187 index_check = True
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188 else:
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189 raise ResolverError('Invalid path element: %s' % (element,))
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190 else:
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191 node_check = None
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192 index_check = element
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193 if node_check is str:
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194 node_check = ScalarNode
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195 elif node_check is list:
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196 node_check = SequenceNode
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197 elif node_check is dict:
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198 node_check = MappingNode
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199 elif (
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200 node_check not in [ScalarNode, SequenceNode, MappingNode]
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201 and not isinstance(node_check, string_types)
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202 and node_check is not None
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203 ):
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204 raise ResolverError('Invalid node checker: %s' % (node_check,))
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205 if not isinstance(index_check, (string_types, int)) and index_check is not None:
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206 raise ResolverError('Invalid index checker: %s' % (index_check,))
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207 new_path.append((node_check, index_check))
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208 if kind is str:
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209 kind = ScalarNode
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210 elif kind is list:
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211 kind = SequenceNode
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212 elif kind is dict:
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213 kind = MappingNode
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214 elif kind not in [ScalarNode, SequenceNode, MappingNode] and kind is not None:
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215 raise ResolverError('Invalid node kind: %s' % (kind,))
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216 cls.yaml_path_resolvers[tuple(new_path), kind] = tag
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217
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218 def descend_resolver(self, current_node, current_index):
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219 # type: (Any, Any) -> None
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220 if not self.yaml_path_resolvers:
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221 return
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222 exact_paths = {}
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223 prefix_paths = []
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224 if current_node:
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225 depth = len(self.resolver_prefix_paths)
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226 for path, kind in self.resolver_prefix_paths[-1]:
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227 if self.check_resolver_prefix(depth, path, kind, current_node, current_index):
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228 if len(path) > depth:
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229 prefix_paths.append((path, kind))
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230 else:
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231 exact_paths[kind] = self.yaml_path_resolvers[path, kind]
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232 else:
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233 for path, kind in self.yaml_path_resolvers:
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234 if not path:
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235 exact_paths[kind] = self.yaml_path_resolvers[path, kind]
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236 else:
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237 prefix_paths.append((path, kind))
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238 self.resolver_exact_paths.append(exact_paths)
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239 self.resolver_prefix_paths.append(prefix_paths)
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240
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241 def ascend_resolver(self):
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242 # type: () -> None
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243 if not self.yaml_path_resolvers:
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244 return
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245 self.resolver_exact_paths.pop()
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246 self.resolver_prefix_paths.pop()
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247
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248 def check_resolver_prefix(self, depth, path, kind, current_node, current_index):
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249 # type: (int, Text, Any, Any, Any) -> bool
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250 node_check, index_check = path[depth - 1]
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251 if isinstance(node_check, string_types):
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252 if current_node.tag != node_check:
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253 return False
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254 elif node_check is not None:
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255 if not isinstance(current_node, node_check):
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256 return False
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257 if index_check is True and current_index is not None:
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258 return False
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259 if (index_check is False or index_check is None) and current_index is None:
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260 return False
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261 if isinstance(index_check, string_types):
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262 if not (
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263 isinstance(current_index, ScalarNode) and index_check == current_index.value
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264 ):
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265 return False
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266 elif isinstance(index_check, int) and not isinstance(index_check, bool):
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267 if index_check != current_index:
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268 return False
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269 return True
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270
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271 def resolve(self, kind, value, implicit):
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272 # type: (Any, Any, Any) -> Any
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273 if kind is ScalarNode and implicit[0]:
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274 if value == "":
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275 resolvers = self.yaml_implicit_resolvers.get("", [])
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276 else:
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277 resolvers = self.yaml_implicit_resolvers.get(value[0], [])
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278 resolvers += self.yaml_implicit_resolvers.get(None, [])
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279 for tag, regexp in resolvers:
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280 if regexp.match(value):
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281 return tag
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282 implicit = implicit[1]
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283 if bool(self.yaml_path_resolvers):
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284 exact_paths = self.resolver_exact_paths[-1]
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285 if kind in exact_paths:
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286 return exact_paths[kind]
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287 if None in exact_paths:
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288 return exact_paths[None]
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289 if kind is ScalarNode:
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290 return self.DEFAULT_SCALAR_TAG
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291 elif kind is SequenceNode:
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292 return self.DEFAULT_SEQUENCE_TAG
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293 elif kind is MappingNode:
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294 return self.DEFAULT_MAPPING_TAG
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295
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296 @property
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297 def processing_version(self):
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298 # type: () -> Any
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299 return None
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300
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301
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302 class Resolver(BaseResolver):
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303 pass
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304
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305
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306 for ir in implicit_resolvers:
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307 if (1, 2) in ir[0]:
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308 Resolver.add_implicit_resolver_base(*ir[1:])
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309
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310
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311 class VersionedResolver(BaseResolver):
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312 """
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313 contrary to the "normal" resolver, the smart resolver delays loading
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314 the pattern matching rules. That way it can decide to load 1.1 rules
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315 or the (default) 1.2 rules, that no longer support octal without 0o, sexagesimals
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316 and Yes/No/On/Off booleans.
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317 """
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318
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319 def __init__(self, version=None, loader=None, loadumper=None):
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320 # type: (Optional[VersionType], Any, Any) -> None
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321 if loader is None and loadumper is not None:
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322 loader = loadumper
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323 BaseResolver.__init__(self, loader)
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324 self._loader_version = self.get_loader_version(version)
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325 self._version_implicit_resolver = {} # type: Dict[Any, Any]
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326
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327 def add_version_implicit_resolver(self, version, tag, regexp, first):
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328 # type: (VersionType, Any, Any, Any) -> None
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329 if first is None:
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330 first = [None]
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331 impl_resolver = self._version_implicit_resolver.setdefault(version, {})
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332 for ch in first:
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333 impl_resolver.setdefault(ch, []).append((tag, regexp))
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334
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335 def get_loader_version(self, version):
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336 # type: (Optional[VersionType]) -> Any
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337 if version is None or isinstance(version, tuple):
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338 return version
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339 if isinstance(version, list):
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340 return tuple(version)
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341 # assume string
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342 return tuple(map(int, version.split(u'.')))
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343
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344 @property
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345 def versioned_resolver(self):
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346 # type: () -> Any
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347 """
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348 select the resolver based on the version we are parsing
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349 """
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350 version = self.processing_version
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351 if version not in self._version_implicit_resolver:
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352 for x in implicit_resolvers:
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353 if version in x[0]:
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354 self.add_version_implicit_resolver(version, x[1], x[2], x[3])
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355 return self._version_implicit_resolver[version]
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356
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357 def resolve(self, kind, value, implicit):
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358 # type: (Any, Any, Any) -> Any
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359 if kind is ScalarNode and implicit[0]:
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360 if value == "":
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361 resolvers = self.versioned_resolver.get("", [])
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362 else:
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363 resolvers = self.versioned_resolver.get(value[0], [])
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364 resolvers += self.versioned_resolver.get(None, [])
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365 for tag, regexp in resolvers:
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366 if regexp.match(value):
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367 return tag
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368 implicit = implicit[1]
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369 if bool(self.yaml_path_resolvers):
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370 exact_paths = self.resolver_exact_paths[-1]
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371 if kind in exact_paths:
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372 return exact_paths[kind]
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373 if None in exact_paths:
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374 return exact_paths[None]
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375 if kind is ScalarNode:
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376 return self.DEFAULT_SCALAR_TAG
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377 elif kind is SequenceNode:
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378 return self.DEFAULT_SEQUENCE_TAG
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379 elif kind is MappingNode:
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380 return self.DEFAULT_MAPPING_TAG
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381
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382 @property
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383 def processing_version(self):
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384 # type: () -> Any
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385 try:
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386 version = self.parser.yaml_version
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387 except AttributeError:
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388 try:
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389 if hasattr(self.loadumper, 'typ'):
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390 version = self.loadumper.version
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391 else:
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392 version = self.loadumper._serializer.use_version # dumping
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393 except AttributeError:
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394 version = None
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395 if version is None:
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396 version = self._loader_version
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397 if version is None:
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398 version = _DEFAULT_YAML_VERSION
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399 return version