Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/ruamel/yaml/serializer.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 # coding: utf-8
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2
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3 from __future__ import absolute_import
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4
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5 from ruamel.yaml.error import YAMLError
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6 from ruamel.yaml.compat import nprint, DBG_NODE, dbg, string_types, nprintf # NOQA
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7 from ruamel.yaml.util import RegExp
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8
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9 from ruamel.yaml.events import (
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10 StreamStartEvent,
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11 StreamEndEvent,
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12 MappingStartEvent,
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13 MappingEndEvent,
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14 SequenceStartEvent,
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15 SequenceEndEvent,
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16 AliasEvent,
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17 ScalarEvent,
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18 DocumentStartEvent,
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19 DocumentEndEvent,
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20 )
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21 from ruamel.yaml.nodes import MappingNode, ScalarNode, SequenceNode
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22
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23 if False: # MYPY
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24 from typing import Any, Dict, Union, Text, Optional # NOQA
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25 from ruamel.yaml.compat import VersionType # NOQA
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26
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27 __all__ = ['Serializer', 'SerializerError']
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28
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29
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30 class SerializerError(YAMLError):
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31 pass
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32
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33
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34 class Serializer(object):
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35
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36 # 'id' and 3+ numbers, but not 000
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37 ANCHOR_TEMPLATE = u'id%03d'
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38 ANCHOR_RE = RegExp(u'id(?!000$)\\d{3,}')
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39
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40 def __init__(
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41 self,
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42 encoding=None,
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43 explicit_start=None,
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44 explicit_end=None,
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45 version=None,
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46 tags=None,
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47 dumper=None,
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48 ):
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49 # type: (Any, Optional[bool], Optional[bool], Optional[VersionType], Any, Any) -> None # NOQA
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50 self.dumper = dumper
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51 if self.dumper is not None:
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52 self.dumper._serializer = self
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53 self.use_encoding = encoding
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54 self.use_explicit_start = explicit_start
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55 self.use_explicit_end = explicit_end
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56 if isinstance(version, string_types):
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57 self.use_version = tuple(map(int, version.split('.')))
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58 else:
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59 self.use_version = version # type: ignore
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60 self.use_tags = tags
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61 self.serialized_nodes = {} # type: Dict[Any, Any]
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62 self.anchors = {} # type: Dict[Any, Any]
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63 self.last_anchor_id = 0
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64 self.closed = None # type: Optional[bool]
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65 self._templated_id = None
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66
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67 @property
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68 def emitter(self):
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69 # type: () -> Any
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70 if hasattr(self.dumper, 'typ'):
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71 return self.dumper.emitter
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72 return self.dumper._emitter
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73
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74 @property
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75 def resolver(self):
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76 # type: () -> Any
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77 if hasattr(self.dumper, 'typ'):
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78 self.dumper.resolver
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79 return self.dumper._resolver
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80
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81 def open(self):
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82 # type: () -> None
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83 if self.closed is None:
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84 self.emitter.emit(StreamStartEvent(encoding=self.use_encoding))
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85 self.closed = False
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86 elif self.closed:
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87 raise SerializerError('serializer is closed')
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88 else:
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89 raise SerializerError('serializer is already opened')
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90
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91 def close(self):
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92 # type: () -> None
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93 if self.closed is None:
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94 raise SerializerError('serializer is not opened')
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95 elif not self.closed:
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96 self.emitter.emit(StreamEndEvent())
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97 self.closed = True
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98
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99 # def __del__(self):
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100 # self.close()
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101
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102 def serialize(self, node):
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103 # type: (Any) -> None
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104 if dbg(DBG_NODE):
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105 nprint('Serializing nodes')
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106 node.dump()
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107 if self.closed is None:
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108 raise SerializerError('serializer is not opened')
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109 elif self.closed:
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110 raise SerializerError('serializer is closed')
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111 self.emitter.emit(
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112 DocumentStartEvent(
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113 explicit=self.use_explicit_start, version=self.use_version, tags=self.use_tags
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114 )
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115 )
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116 self.anchor_node(node)
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117 self.serialize_node(node, None, None)
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118 self.emitter.emit(DocumentEndEvent(explicit=self.use_explicit_end))
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119 self.serialized_nodes = {}
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120 self.anchors = {}
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121 self.last_anchor_id = 0
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122
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123 def anchor_node(self, node):
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124 # type: (Any) -> None
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125 if node in self.anchors:
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126 if self.anchors[node] is None:
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127 self.anchors[node] = self.generate_anchor(node)
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128 else:
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129 anchor = None
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130 try:
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131 if node.anchor.always_dump:
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132 anchor = node.anchor.value
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133 except: # NOQA
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134 pass
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135 self.anchors[node] = anchor
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136 if isinstance(node, SequenceNode):
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137 for item in node.value:
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138 self.anchor_node(item)
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139 elif isinstance(node, MappingNode):
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140 for key, value in node.value:
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141 self.anchor_node(key)
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142 self.anchor_node(value)
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143
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144 def generate_anchor(self, node):
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145 # type: (Any) -> Any
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146 try:
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147 anchor = node.anchor.value
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148 except: # NOQA
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149 anchor = None
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150 if anchor is None:
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151 self.last_anchor_id += 1
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152 return self.ANCHOR_TEMPLATE % self.last_anchor_id
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153 return anchor
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154
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155 def serialize_node(self, node, parent, index):
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156 # type: (Any, Any, Any) -> None
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157 alias = self.anchors[node]
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158 if node in self.serialized_nodes:
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159 self.emitter.emit(AliasEvent(alias))
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160 else:
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161 self.serialized_nodes[node] = True
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162 self.resolver.descend_resolver(parent, index)
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163 if isinstance(node, ScalarNode):
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164 # here check if the node.tag equals the one that would result from parsing
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165 # if not equal quoting is necessary for strings
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166 detected_tag = self.resolver.resolve(ScalarNode, node.value, (True, False))
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167 default_tag = self.resolver.resolve(ScalarNode, node.value, (False, True))
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168 implicit = (
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169 (node.tag == detected_tag),
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170 (node.tag == default_tag),
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171 node.tag.startswith('tag:yaml.org,2002:'),
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172 )
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173 self.emitter.emit(
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174 ScalarEvent(
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175 alias,
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176 node.tag,
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177 implicit,
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178 node.value,
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179 style=node.style,
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180 comment=node.comment,
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181 )
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182 )
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183 elif isinstance(node, SequenceNode):
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184 implicit = node.tag == self.resolver.resolve(SequenceNode, node.value, True)
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185 comment = node.comment
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186 end_comment = None
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187 seq_comment = None
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188 if node.flow_style is True:
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189 if comment: # eol comment on flow style sequence
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190 seq_comment = comment[0]
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191 # comment[0] = None
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192 if comment and len(comment) > 2:
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193 end_comment = comment[2]
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194 else:
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195 end_comment = None
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196 self.emitter.emit(
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197 SequenceStartEvent(
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198 alias,
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199 node.tag,
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200 implicit,
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201 flow_style=node.flow_style,
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202 comment=node.comment,
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203 )
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204 )
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205 index = 0
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206 for item in node.value:
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207 self.serialize_node(item, node, index)
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208 index += 1
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209 self.emitter.emit(SequenceEndEvent(comment=[seq_comment, end_comment]))
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210 elif isinstance(node, MappingNode):
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211 implicit = node.tag == self.resolver.resolve(MappingNode, node.value, True)
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212 comment = node.comment
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213 end_comment = None
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214 map_comment = None
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215 if node.flow_style is True:
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216 if comment: # eol comment on flow style sequence
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217 map_comment = comment[0]
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218 # comment[0] = None
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219 if comment and len(comment) > 2:
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220 end_comment = comment[2]
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221 self.emitter.emit(
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222 MappingStartEvent(
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223 alias,
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224 node.tag,
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225 implicit,
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226 flow_style=node.flow_style,
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227 comment=node.comment,
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228 nr_items=len(node.value),
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229 )
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230 )
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231 for key, value in node.value:
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232 self.serialize_node(key, node, None)
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233 self.serialize_node(value, node, key)
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234 self.emitter.emit(MappingEndEvent(comment=[map_comment, end_comment]))
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235 self.resolver.ascend_resolver()
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236
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237
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238 def templated_id(s):
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239 # type: (Text) -> Any
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240 return Serializer.ANCHOR_RE.match(s)