Mercurial > repos > shellac > guppy_basecaller

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

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"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:20:52 -0400
parents 26e78fe6e8c4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1
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2 from .error import *
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3
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4 from .tokens import *
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5 from .events import *
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6 from .nodes import *
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7
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8 from .loader import *
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9 from .dumper import *
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10
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11 __version__ = '5.3.1'
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12 try:
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13 from .cyaml import *
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14 __with_libyaml__ = True
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15 except ImportError:
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16 __with_libyaml__ = False
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17
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18 import io
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19
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20 #------------------------------------------------------------------------------
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21 # Warnings control
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22 #------------------------------------------------------------------------------
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23
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24 # 'Global' warnings state:
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25 _warnings_enabled = {
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26 'YAMLLoadWarning': True,
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27 }
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28
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29 # Get or set global warnings' state
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30 def warnings(settings=None):
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31 if settings is None:
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32 return _warnings_enabled
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33
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34 if type(settings) is dict:
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35 for key in settings:
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36 if key in _warnings_enabled:
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37 _warnings_enabled[key] = settings[key]
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38
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39 # Warn when load() is called without Loader=...
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40 class YAMLLoadWarning(RuntimeWarning):
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41 pass
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42
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43 def load_warning(method):
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44 if _warnings_enabled['YAMLLoadWarning'] is False:
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45 return
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46
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47 import warnings
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48
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49 message = (
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50 "calling yaml.%s() without Loader=... is deprecated, as the "
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51 "default Loader is unsafe. Please read "
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52 "https://msg.pyyaml.org/load for full details."
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53 ) % method
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54
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55 warnings.warn(message, YAMLLoadWarning, stacklevel=3)
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56
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57 #------------------------------------------------------------------------------
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58 def scan(stream, Loader=Loader):
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59 """
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60 Scan a YAML stream and produce scanning tokens.
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61 """
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62 loader = Loader(stream)
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63 try:
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64 while loader.check_token():
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65 yield loader.get_token()
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66 finally:
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67 loader.dispose()
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68
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69 def parse(stream, Loader=Loader):
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70 """
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71 Parse a YAML stream and produce parsing events.
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72 """
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73 loader = Loader(stream)
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74 try:
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75 while loader.check_event():
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76 yield loader.get_event()
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77 finally:
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78 loader.dispose()
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79
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80 def compose(stream, Loader=Loader):
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81 """
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82 Parse the first YAML document in a stream
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83 and produce the corresponding representation tree.
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84 """
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85 loader = Loader(stream)
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86 try:
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87 return loader.get_single_node()
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88 finally:
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89 loader.dispose()
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90
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91 def compose_all(stream, Loader=Loader):
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92 """
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93 Parse all YAML documents in a stream
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94 and produce corresponding representation trees.
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95 """
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96 loader = Loader(stream)
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97 try:
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98 while loader.check_node():
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99 yield loader.get_node()
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100 finally:
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101 loader.dispose()
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102
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103 def load(stream, Loader=None):
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104 """
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105 Parse the first YAML document in a stream
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106 and produce the corresponding Python object.
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107 """
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108 if Loader is None:
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109 load_warning('load')
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110 Loader = FullLoader
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111
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112 loader = Loader(stream)
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113 try:
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114 return loader.get_single_data()
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115 finally:
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116 loader.dispose()
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117
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118 def load_all(stream, Loader=None):
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119 """
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120 Parse all YAML documents in a stream
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121 and produce corresponding Python objects.
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122 """
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123 if Loader is None:
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124 load_warning('load_all')
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125 Loader = FullLoader
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126
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127 loader = Loader(stream)
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128 try:
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129 while loader.check_data():
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130 yield loader.get_data()
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131 finally:
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132 loader.dispose()
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133
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134 def full_load(stream):
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135 """
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136 Parse the first YAML document in a stream
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137 and produce the corresponding Python object.
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138
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139 Resolve all tags except those known to be
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140 unsafe on untrusted input.
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141 """
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142 return load(stream, FullLoader)
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143
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144 def full_load_all(stream):
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145 """
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146 Parse all YAML documents in a stream
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147 and produce corresponding Python objects.
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148
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149 Resolve all tags except those known to be
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150 unsafe on untrusted input.
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151 """
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152 return load_all(stream, FullLoader)
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153
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154 def safe_load(stream):
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155 """
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156 Parse the first YAML document in a stream
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157 and produce the corresponding Python object.
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158
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159 Resolve only basic YAML tags. This is known
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160 to be safe for untrusted input.
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161 """
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162 return load(stream, SafeLoader)
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163
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164 def safe_load_all(stream):
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165 """
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166 Parse all YAML documents in a stream
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167 and produce corresponding Python objects.
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168
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169 Resolve only basic YAML tags. This is known
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170 to be safe for untrusted input.
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171 """
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172 return load_all(stream, SafeLoader)
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173
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174 def unsafe_load(stream):
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175 """
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176 Parse the first YAML document in a stream
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177 and produce the corresponding Python object.
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178
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179 Resolve all tags, even those known to be
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180 unsafe on untrusted input.
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181 """
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182 return load(stream, UnsafeLoader)
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183
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184 def unsafe_load_all(stream):
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185 """
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186 Parse all YAML documents in a stream
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187 and produce corresponding Python objects.
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188
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189 Resolve all tags, even those known to be
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190 unsafe on untrusted input.
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191 """
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192 return load_all(stream, UnsafeLoader)
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193
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194 def emit(events, stream=None, Dumper=Dumper,
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195 canonical=None, indent=None, width=None,
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196 allow_unicode=None, line_break=None):
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197 """
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198 Emit YAML parsing events into a stream.
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199 If stream is None, return the produced string instead.
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200 """
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201 getvalue = None
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202 if stream is None:
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203 stream = io.StringIO()
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204 getvalue = stream.getvalue
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205 dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
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206 allow_unicode=allow_unicode, line_break=line_break)
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207 try:
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208 for event in events:
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209 dumper.emit(event)
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210 finally:
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211 dumper.dispose()
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212 if getvalue:
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213 return getvalue()
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214
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215 def serialize_all(nodes, stream=None, Dumper=Dumper,
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216 canonical=None, indent=None, width=None,
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217 allow_unicode=None, line_break=None,
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218 encoding=None, explicit_start=None, explicit_end=None,
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219 version=None, tags=None):
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220 """
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221 Serialize a sequence of representation trees into a YAML stream.
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222 If stream is None, return the produced string instead.
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223 """
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224 getvalue = None
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225 if stream is None:
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226 if encoding is None:
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227 stream = io.StringIO()
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228 else:
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229 stream = io.BytesIO()
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230 getvalue = stream.getvalue
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231 dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
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232 allow_unicode=allow_unicode, line_break=line_break,
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233 encoding=encoding, version=version, tags=tags,
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234 explicit_start=explicit_start, explicit_end=explicit_end)
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235 try:
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236 dumper.open()
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237 for node in nodes:
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238 dumper.serialize(node)
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239 dumper.close()
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240 finally:
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241 dumper.dispose()
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242 if getvalue:
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243 return getvalue()
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244
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245 def serialize(node, stream=None, Dumper=Dumper, **kwds):
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246 """
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247 Serialize a representation tree into a YAML stream.
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248 If stream is None, return the produced string instead.
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249 """
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250 return serialize_all([node], stream, Dumper=Dumper, **kwds)
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251
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252 def dump_all(documents, stream=None, Dumper=Dumper,
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253 default_style=None, default_flow_style=False,
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254 canonical=None, indent=None, width=None,
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255 allow_unicode=None, line_break=None,
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256 encoding=None, explicit_start=None, explicit_end=None,
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257 version=None, tags=None, sort_keys=True):
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258 """
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259 Serialize a sequence of Python objects into a YAML stream.
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260 If stream is None, return the produced string instead.
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261 """
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262 getvalue = None
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263 if stream is None:
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264 if encoding is None:
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265 stream = io.StringIO()
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266 else:
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267 stream = io.BytesIO()
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268 getvalue = stream.getvalue
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269 dumper = Dumper(stream, default_style=default_style,
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270 default_flow_style=default_flow_style,
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271 canonical=canonical, indent=indent, width=width,
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272 allow_unicode=allow_unicode, line_break=line_break,
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273 encoding=encoding, version=version, tags=tags,
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274 explicit_start=explicit_start, explicit_end=explicit_end, sort_keys=sort_keys)
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275 try:
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276 dumper.open()
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277 for data in documents:
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278 dumper.represent(data)
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279 dumper.close()
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280 finally:
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281 dumper.dispose()
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282 if getvalue:
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283 return getvalue()
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284
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285 def dump(data, stream=None, Dumper=Dumper, **kwds):
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286 """
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287 Serialize a Python object into a YAML stream.
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288 If stream is None, return the produced string instead.
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289 """
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290 return dump_all([data], stream, Dumper=Dumper, **kwds)
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291
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292 def safe_dump_all(documents, stream=None, **kwds):
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293 """
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294 Serialize a sequence of Python objects into a YAML stream.
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295 Produce only basic YAML tags.
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296 If stream is None, return the produced string instead.
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297 """
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298 return dump_all(documents, stream, Dumper=SafeDumper, **kwds)
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299
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300 def safe_dump(data, stream=None, **kwds):
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301 """
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302 Serialize a Python object into a YAML stream.
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303 Produce only basic YAML tags.
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304 If stream is None, return the produced string instead.
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305 """
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306 return dump_all([data], stream, Dumper=SafeDumper, **kwds)
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307
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308 def add_implicit_resolver(tag, regexp, first=None,
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309 Loader=None, Dumper=Dumper):
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310 """
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311 Add an implicit scalar detector.
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312 If an implicit scalar value matches the given regexp,
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313 the corresponding tag is assigned to the scalar.
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314 first is a sequence of possible initial characters or None.
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315 """
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316 if Loader is None:
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317 loader.Loader.add_implicit_resolver(tag, regexp, first)
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318 loader.FullLoader.add_implicit_resolver(tag, regexp, first)
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319 loader.UnsafeLoader.add_implicit_resolver(tag, regexp, first)
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320 else:
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321 Loader.add_implicit_resolver(tag, regexp, first)
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322 Dumper.add_implicit_resolver(tag, regexp, first)
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323
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324 def add_path_resolver(tag, path, kind=None, Loader=None, Dumper=Dumper):
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325 """
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326 Add a path based resolver for the given tag.
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327 A path is a list of keys that forms a path
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328 to a node in the representation tree.
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329 Keys can be string values, integers, or None.
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330 """
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331 if Loader is None:
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332 loader.Loader.add_path_resolver(tag, path, kind)
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333 loader.FullLoader.add_path_resolver(tag, path, kind)
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334 loader.UnsafeLoader.add_path_resolver(tag, path, kind)
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335 else:
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336 Loader.add_path_resolver(tag, path, kind)
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337 Dumper.add_path_resolver(tag, path, kind)
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338
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339 def add_constructor(tag, constructor, Loader=None):
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340 """
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341 Add a constructor for the given tag.
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342 Constructor is a function that accepts a Loader instance
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343 and a node object and produces the corresponding Python object.
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344 """
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345 if Loader is None:
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346 loader.Loader.add_constructor(tag, constructor)
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347 loader.FullLoader.add_constructor(tag, constructor)
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348 loader.UnsafeLoader.add_constructor(tag, constructor)
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349 else:
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350 Loader.add_constructor(tag, constructor)
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351
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352 def add_multi_constructor(tag_prefix, multi_constructor, Loader=None):
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353 """
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354 Add a multi-constructor for the given tag prefix.
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355 Multi-constructor is called for a node if its tag starts with tag_prefix.
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356 Multi-constructor accepts a Loader instance, a tag suffix,
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357 and a node object and produces the corresponding Python object.
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358 """
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359 if Loader is None:
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360 loader.Loader.add_multi_constructor(tag_prefix, multi_constructor)
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361 loader.FullLoader.add_multi_constructor(tag_prefix, multi_constructor)
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362 loader.UnsafeLoader.add_multi_constructor(tag_prefix, multi_constructor)
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363 else:
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364 Loader.add_multi_constructor(tag_prefix, multi_constructor)
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365
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366 def add_representer(data_type, representer, Dumper=Dumper):
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367 """
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368 Add a representer for the given type.
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369 Representer is a function accepting a Dumper instance
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370 and an instance of the given data type
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371 and producing the corresponding representation node.
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372 """
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373 Dumper.add_representer(data_type, representer)
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374
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375 def add_multi_representer(data_type, multi_representer, Dumper=Dumper):
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376 """
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377 Add a representer for the given type.
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378 Multi-representer is a function accepting a Dumper instance
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379 and an instance of the given data type or subtype
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380 and producing the corresponding representation node.
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381 """
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382 Dumper.add_multi_representer(data_type, multi_representer)
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383
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384 class YAMLObjectMetaclass(type):
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385 """
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386 The metaclass for YAMLObject.
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387 """
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388 def __init__(cls, name, bases, kwds):
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389 super(YAMLObjectMetaclass, cls).__init__(name, bases, kwds)
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390 if 'yaml_tag' in kwds and kwds['yaml_tag'] is not None:
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391 if isinstance(cls.yaml_loader, list):
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392 for loader in cls.yaml_loader:
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393 loader.add_constructor(cls.yaml_tag, cls.from_yaml)
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394 else:
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395 cls.yaml_loader.add_constructor(cls.yaml_tag, cls.from_yaml)
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396
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397 cls.yaml_dumper.add_representer(cls, cls.to_yaml)
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398
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399 class YAMLObject(metaclass=YAMLObjectMetaclass):
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400 """
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401 An object that can dump itself to a YAML stream
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402 and load itself from a YAML stream.
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403 """
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404
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405 __slots__ = () # no direct instantiation, so allow immutable subclasses
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406
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407 yaml_loader = [Loader, FullLoader, UnsafeLoader]
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408 yaml_dumper = Dumper
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409
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410 yaml_tag = None
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411 yaml_flow_style = None
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412
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413 @classmethod
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414 def from_yaml(cls, loader, node):
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415 """
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416 Convert a representation node to a Python object.
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417 """
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418 return loader.construct_yaml_object(node, cls)
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419
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420 @classmethod
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421 def to_yaml(cls, dumper, data):
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422 """
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423 Convert a Python object to a representation node.
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424 """
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425 return dumper.represent_yaml_object(cls.yaml_tag, data, cls,
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426 flow_style=cls.yaml_flow_style)
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427