Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/ruamel/yaml/composer.py @ 4:79f47841a781 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:47:39 -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, print_function
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4
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5 import warnings
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6
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7 from ruamel.yaml.error import MarkedYAMLError, ReusedAnchorWarning
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8 from ruamel.yaml.compat import utf8, nprint, nprintf # NOQA
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9
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10 from ruamel.yaml.events import (
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11 StreamStartEvent,
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12 StreamEndEvent,
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13 MappingStartEvent,
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14 MappingEndEvent,
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15 SequenceStartEvent,
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16 SequenceEndEvent,
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17 AliasEvent,
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18 ScalarEvent,
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19 )
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20 from ruamel.yaml.nodes import MappingNode, ScalarNode, SequenceNode
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21
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22 if False: # MYPY
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23 from typing import Any, Dict, Optional, List # NOQA
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24
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25 __all__ = ['Composer', 'ComposerError']
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26
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27
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28 class ComposerError(MarkedYAMLError):
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29 pass
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30
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31
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32 class Composer(object):
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33 def __init__(self, loader=None):
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34 # type: (Any) -> None
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35 self.loader = loader
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36 if self.loader is not None and getattr(self.loader, '_composer', None) is None:
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37 self.loader._composer = self
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38 self.anchors = {} # type: Dict[Any, Any]
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39
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40 @property
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41 def parser(self):
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42 # type: () -> Any
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43 if hasattr(self.loader, 'typ'):
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44 self.loader.parser
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45 return self.loader._parser
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46
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47 @property
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48 def resolver(self):
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49 # type: () -> Any
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50 # assert self.loader._resolver is not None
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51 if hasattr(self.loader, 'typ'):
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52 self.loader.resolver
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53 return self.loader._resolver
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54
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55 def check_node(self):
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56 # type: () -> Any
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57 # Drop the STREAM-START event.
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58 if self.parser.check_event(StreamStartEvent):
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59 self.parser.get_event()
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60
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61 # If there are more documents available?
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62 return not self.parser.check_event(StreamEndEvent)
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63
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64 def get_node(self):
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65 # type: () -> Any
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66 # Get the root node of the next document.
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67 if not self.parser.check_event(StreamEndEvent):
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68 return self.compose_document()
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69
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70 def get_single_node(self):
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71 # type: () -> Any
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72 # Drop the STREAM-START event.
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73 self.parser.get_event()
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74
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75 # Compose a document if the stream is not empty.
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76 document = None # type: Any
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77 if not self.parser.check_event(StreamEndEvent):
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78 document = self.compose_document()
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79
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80 # Ensure that the stream contains no more documents.
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81 if not self.parser.check_event(StreamEndEvent):
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82 event = self.parser.get_event()
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83 raise ComposerError(
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84 'expected a single document in the stream',
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85 document.start_mark,
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86 'but found another document',
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87 event.start_mark,
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88 )
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89
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90 # Drop the STREAM-END event.
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91 self.parser.get_event()
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92
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93 return document
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94
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95 def compose_document(self):
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96 # type: (Any) -> Any
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97 # Drop the DOCUMENT-START event.
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98 self.parser.get_event()
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99
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100 # Compose the root node.
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101 node = self.compose_node(None, None)
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102
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103 # Drop the DOCUMENT-END event.
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104 self.parser.get_event()
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105
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106 self.anchors = {}
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107 return node
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108
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109 def compose_node(self, parent, index):
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110 # type: (Any, Any) -> Any
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111 if self.parser.check_event(AliasEvent):
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112 event = self.parser.get_event()
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113 alias = event.anchor
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114 if alias not in self.anchors:
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115 raise ComposerError(
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116 None, None, 'found undefined alias %r' % utf8(alias), event.start_mark
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117 )
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118 return self.anchors[alias]
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119 event = self.parser.peek_event()
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120 anchor = event.anchor
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121 if anchor is not None: # have an anchor
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122 if anchor in self.anchors:
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123 # raise ComposerError(
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124 # "found duplicate anchor %r; first occurrence"
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125 # % utf8(anchor), self.anchors[anchor].start_mark,
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126 # "second occurrence", event.start_mark)
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127 ws = (
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128 '\nfound duplicate anchor {!r}\nfirst occurrence {}\nsecond occurrence '
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129 '{}'.format((anchor), self.anchors[anchor].start_mark, event.start_mark)
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130 )
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131 warnings.warn(ws, ReusedAnchorWarning)
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132 self.resolver.descend_resolver(parent, index)
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133 if self.parser.check_event(ScalarEvent):
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134 node = self.compose_scalar_node(anchor)
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135 elif self.parser.check_event(SequenceStartEvent):
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136 node = self.compose_sequence_node(anchor)
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137 elif self.parser.check_event(MappingStartEvent):
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138 node = self.compose_mapping_node(anchor)
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139 self.resolver.ascend_resolver()
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140 return node
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141
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142 def compose_scalar_node(self, anchor):
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143 # type: (Any) -> Any
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144 event = self.parser.get_event()
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145 tag = event.tag
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146 if tag is None or tag == u'!':
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147 tag = self.resolver.resolve(ScalarNode, event.value, event.implicit)
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148 node = ScalarNode(
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149 tag,
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150 event.value,
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151 event.start_mark,
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152 event.end_mark,
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153 style=event.style,
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154 comment=event.comment,
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155 anchor=anchor,
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156 )
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157 if anchor is not None:
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158 self.anchors[anchor] = node
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159 return node
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160
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161 def compose_sequence_node(self, anchor):
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162 # type: (Any) -> Any
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163 start_event = self.parser.get_event()
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164 tag = start_event.tag
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165 if tag is None or tag == u'!':
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166 tag = self.resolver.resolve(SequenceNode, None, start_event.implicit)
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167 node = SequenceNode(
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168 tag,
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169 [],
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170 start_event.start_mark,
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171 None,
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172 flow_style=start_event.flow_style,
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173 comment=start_event.comment,
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174 anchor=anchor,
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175 )
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176 if anchor is not None:
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177 self.anchors[anchor] = node
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178 index = 0
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179 while not self.parser.check_event(SequenceEndEvent):
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180 node.value.append(self.compose_node(node, index))
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181 index += 1
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182 end_event = self.parser.get_event()
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183 if node.flow_style is True and end_event.comment is not None:
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184 if node.comment is not None:
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185 nprint(
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186 'Warning: unexpected end_event commment in sequence '
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187 'node {}'.format(node.flow_style)
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188 )
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189 node.comment = end_event.comment
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190 node.end_mark = end_event.end_mark
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191 self.check_end_doc_comment(end_event, node)
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192 return node
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193
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194 def compose_mapping_node(self, anchor):
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195 # type: (Any) -> Any
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196 start_event = self.parser.get_event()
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197 tag = start_event.tag
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198 if tag is None or tag == u'!':
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199 tag = self.resolver.resolve(MappingNode, None, start_event.implicit)
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200 node = MappingNode(
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201 tag,
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202 [],
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203 start_event.start_mark,
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204 None,
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205 flow_style=start_event.flow_style,
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206 comment=start_event.comment,
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207 anchor=anchor,
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208 )
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209 if anchor is not None:
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210 self.anchors[anchor] = node
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211 while not self.parser.check_event(MappingEndEvent):
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212 # key_event = self.parser.peek_event()
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213 item_key = self.compose_node(node, None)
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214 # if item_key in node.value:
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215 # raise ComposerError("while composing a mapping",
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216 # start_event.start_mark,
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217 # "found duplicate key", key_event.start_mark)
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218 item_value = self.compose_node(node, item_key)
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219 # node.value[item_key] = item_value
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220 node.value.append((item_key, item_value))
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221 end_event = self.parser.get_event()
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222 if node.flow_style is True and end_event.comment is not None:
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223 node.comment = end_event.comment
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224 node.end_mark = end_event.end_mark
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225 self.check_end_doc_comment(end_event, node)
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226 return node
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227
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228 def check_end_doc_comment(self, end_event, node):
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229 # type: (Any, Any) -> None
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230 if end_event.comment and end_event.comment[1]:
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231 # pre comments on an end_event, no following to move to
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232 if node.comment is None:
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233 node.comment = [None, None]
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234 assert not isinstance(node, ScalarEvent)
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235 # this is a post comment on a mapping node, add as third element
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236 # in the list
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237 node.comment.append(end_event.comment[1])
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238 end_event.comment[1] = None