Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/pyaml/__init__.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 from __future__ import unicode_literals, print_function
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3
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4 import itertools as it, operator as op, functools as ft
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5 from collections import defaultdict, OrderedDict, namedtuple
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6 import os, sys, io, re
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7
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8 import yaml
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9
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10 if sys.version_info.major > 2: unicode = str
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11
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12
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13 class PrettyYAMLDumper(yaml.dumper.SafeDumper):
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14
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15 def __init__(self, *args, **kws):
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16 self.pyaml_force_embed = kws.pop('force_embed', False)
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17 self.pyaml_string_val_style = kws.pop('string_val_style', None)
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18 self.pyaml_sort_dicts = kws.pop('sort_dicts', True)
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19 return super(PrettyYAMLDumper, self).__init__(*args, **kws)
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20
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21 def represent_odict(dumper, data):
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22 value = list()
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23 node = yaml.nodes.MappingNode(
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24 'tag:yaml.org,2002:map', value, flow_style=None )
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25 if dumper.alias_key is not None:
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26 dumper.represented_objects[dumper.alias_key] = node
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27 for item_key, item_value in data.items():
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28 node_key = dumper.represent_data(item_key)
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29 node_value = dumper.represent_data(item_value)
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30 value.append((node_key, node_value))
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31 node.flow_style = False
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32 return node
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33
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34 def represent_undefined(dumper, data):
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35 if isinstance(data, tuple) and hasattr(data, '_make') and hasattr(data, '_asdict'):
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36 return dumper.represent_odict(data._asdict()) # assuming namedtuple
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37 elif isinstance(data, OrderedDict): return dumper.represent_odict(data)
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38 elif isinstance(data, dict): return dumper.represent_dict(data)
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39 elif callable(getattr(data, 'tolist', None)): return dumper.represent_data(data.tolist())
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40 return super(PrettyYAMLDumper, dumper).represent_undefined(data)
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41
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42 def represent_dict(dumper, data):
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43 if not dumper.pyaml_sort_dicts: return dumper.represent_odict(data)
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44 return super(PrettyYAMLDumper, dumper).represent_dict(data)
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45
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46 def serialize_node(self, node, parent, index):
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47 if self.pyaml_force_embed: self.serialized_nodes.clear()
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48 return super(PrettyYAMLDumper, self).serialize_node(node, parent, index)
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49
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50 @staticmethod
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51 def pyaml_transliterate(string):
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52 if not all(ord(c) < 128 for c in string):
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53 from unidecode import unidecode
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54 string = unidecode(string)
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55 string_new = ''
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56 for ch in string:
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57 if '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z' or ch in '-_': string_new += ch
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58 else: string_new += '_'
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59 return string_new.lower()
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60
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61 def anchor_node(self, node, hint=list()):
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62 if node in self.anchors:
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63 if self.anchors[node] is None and not self.pyaml_force_embed:
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64 self.anchors[node] = self.generate_anchor(node)\
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65 if not hint else '{}'.format(
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66 self.pyaml_transliterate(
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67 '_-_'.join(map(op.attrgetter('value'), hint)) ) )
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68 else:
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69 self.anchors[node] = None
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70 if isinstance(node, yaml.nodes.SequenceNode):
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71 for item in node.value:
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72 self.anchor_node(item)
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73 elif isinstance(node, yaml.nodes.MappingNode):
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74 for key, value in node.value:
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75 self.anchor_node(key)
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76 self.anchor_node(value, hint=hint+[key])
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77
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78 PrettyYAMLDumper.add_representer(dict, PrettyYAMLDumper.represent_dict)
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79 PrettyYAMLDumper.add_representer(defaultdict, PrettyYAMLDumper.represent_dict)
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80 PrettyYAMLDumper.add_representer(OrderedDict, PrettyYAMLDumper.represent_odict)
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81 PrettyYAMLDumper.add_representer(set, PrettyYAMLDumper.represent_list)
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82 PrettyYAMLDumper.add_representer(None, PrettyYAMLDumper.represent_undefined)
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83
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84 if sys.version_info.major >= 3:
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85 try: import pathlib
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86 except ImportError: pass
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87 else:
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88 PrettyYAMLDumper.add_representer(
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89 type(pathlib.Path('')), lambda cls,o: cls.represent_data(str(o)) )
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90
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91
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92 class UnsafePrettyYAMLDumper(PrettyYAMLDumper):
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93
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94 def expect_block_sequence(self):
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95 self.increase_indent(flow=False, indentless=False)
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96 self.state = self.expect_first_block_sequence_item
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97
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98 def expect_block_sequence_item(self, first=False):
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99 if not first and isinstance(self.event, yaml.events.SequenceEndEvent):
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100 self.indent = self.indents.pop()
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101 self.state = self.states.pop()
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102 else:
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103 self.write_indent()
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104 self.write_indicator('-', True, indention=True)
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105 self.states.append(self.expect_block_sequence_item)
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106 self.expect_node(sequence=True)
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107
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108 def choose_scalar_style(self):
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109 is_dict_key = self.states[-1] == self.expect_block_mapping_simple_value
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110 if is_dict_key:
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111 # Don't mess-up (replace) styles for dict keys, if possible
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112 if self.pyaml_string_val_style: self.event.style = 'plain'
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113 else:
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114 # Make sure we don't create "key: null" mapping accidentally
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115 if self.event.value.endswith(':'): self.event.style = "'"
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116 return super(UnsafePrettyYAMLDumper, self).choose_scalar_style()\
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117 if self.event.style != 'plain' else ("'" if ' ' in self.event.value else None)
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118
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119 def represent_stringish(dumper, data):
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120 # Will crash on bytestrings with weird chars in them,
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121 # because we can't tell if it's supposed to be e.g. utf-8 readable string
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122 # or an arbitrary binary buffer, and former one *must* be pretty-printed
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123 # PyYAML's Representer.represent_str does the guesswork and !!binary or !!python/str
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124 # Explicit crash on any bytes object might be more sane, but also annoying
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125 # Use something like base64 to encode such buffer values instead
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126 # Having such binary stuff pretty much everywhere on unix (e.g. paths) kinda sucks
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127 data = unicode(data) # read the comment above
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128
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129 # Try to use '|' style for multiline data,
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130 # quoting it with 'literal' if lines are too long anyway,
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131 # not sure if Emitter.analyze_scalar can also provide useful info here
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132 style = dumper.pyaml_string_val_style
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133 if not style:
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134 style = 'plain'
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135 if '\n' in data or not data or data == '-' or data[0] in '!&*[' or '#' in data:
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136 style = 'literal'
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137 if '\n' in data[:-1]:
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138 for line in data.splitlines():
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139 if len(line) > dumper.best_width: break
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140 else: style = '|'
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141
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142 return yaml.representer.ScalarNode('tag:yaml.org,2002:str', data, style=style)
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143
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144 for str_type in {bytes, unicode}:
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145 UnsafePrettyYAMLDumper.add_representer(
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146 str_type, UnsafePrettyYAMLDumper.represent_stringish )
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147
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148 UnsafePrettyYAMLDumper.add_representer(
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149 type(None), lambda s,o: s.represent_scalar('tag:yaml.org,2002:null', '') )
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150
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151 def add_representer(*args, **kws):
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152 PrettyYAMLDumper.add_representer(*args, **kws)
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153 UnsafePrettyYAMLDumper.add_representer(*args, **kws)
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154
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155
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156 def dump_add_vspacing(buff, vspacing):
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157 'Post-processing to add some nice-ish spacing for deeper map/list levels.'
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158 if isinstance(vspacing, int):
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159 vspacing = ['\n']*(vspacing+1)
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160 buff.seek(0)
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161 result = list()
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162 for line in buff:
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163 level = 0
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164 line = line.decode('utf-8')
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165 result.append(line)
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166 if ':' in line or re.search(r'---(\s*$|\s)', line):
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167 while line.startswith(' '):
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168 level, line = level + 1, line[2:]
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169 if len(vspacing) > level and len(result) != 1:
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170 vspace = vspacing[level]
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171 result.insert( -1, vspace
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172 if not isinstance(vspace, int) else '\n'*vspace )
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173 buff.seek(0), buff.truncate()
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174 buff.write(''.join(result).encode('utf-8'))
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175
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176
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177 def dump_all(data, *dump_args, **dump_kws):
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178 return dump(data, *dump_args, multiple_docs=True, **dump_kws)
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179
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180 def dump( data, dst=unicode, safe=False, force_embed=False, vspacing=None,
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181 string_val_style=None, sort_dicts=True, multiple_docs=False, **pyyaml_kws ):
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182 buff = io.BytesIO()
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183 Dumper = PrettyYAMLDumper if safe else UnsafePrettyYAMLDumper
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184 Dumper = ft.partial( Dumper,
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185 force_embed=force_embed, string_val_style=string_val_style, sort_dicts=sort_dicts )
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186 if not multiple_docs: data = [data]
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187 else: pyyaml_kws.setdefault('explicit_start', True)
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188 yaml.dump_all( data, buff, Dumper=Dumper,
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189 default_flow_style=False, allow_unicode=True, encoding='utf-8', **pyyaml_kws )
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190
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191 if vspacing is not None:
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192 dump_add_vspacing(buff, vspacing)
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193
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194 buff = buff.getvalue()
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195 if dst is bytes: return buff
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196 elif dst is unicode: return buff.decode('utf-8')
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197 else:
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198 try: dst.write(b'') # tests if dst is unicode- or bytestream
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199 except: dst.write(buff.decode('utf-8'))
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200 else: dst.write(buff)
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201
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202 def dumps(data, **dump_kws):
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203 return dump(data, dst=bytes, **dump_kws)
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204
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205 def pprint(*data, **dump_kws):
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206 dst = dump_kws.pop('file', dump_kws.pop('dst', sys.stdout))
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207 if len(data) == 1: data, = data
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208 dump(data, dst=dst, **dump_kws)
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209
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210 p, _p = pprint, print
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211 print = pprint # pyaml.print() won't work without "from __future__ import print_function"