Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/ruamel/yaml/util.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 """
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4 some helper functions that might be generally useful
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5 """
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6
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7 from __future__ import absolute_import, print_function
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8
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9 from functools import partial
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10 import re
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11
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12 from .compat import text_type, binary_type
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13
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14 if False: # MYPY
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15 from typing import Any, Dict, Optional, List, Text # NOQA
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16 from .compat import StreamTextType # NOQA
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17
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18
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19 class LazyEval(object):
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20 """
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21 Lightweight wrapper around lazily evaluated func(*args, **kwargs).
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22
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23 func is only evaluated when any attribute of its return value is accessed.
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24 Every attribute access is passed through to the wrapped value.
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25 (This only excludes special cases like method-wrappers, e.g., __hash__.)
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26 The sole additional attribute is the lazy_self function which holds the
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27 return value (or, prior to evaluation, func and arguments), in its closure.
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28 """
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29
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30 def __init__(self, func, *args, **kwargs):
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31 # type: (Any, Any, Any) -> None
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32 def lazy_self():
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33 # type: () -> Any
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34 return_value = func(*args, **kwargs)
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35 object.__setattr__(self, 'lazy_self', lambda: return_value)
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36 return return_value
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37
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38 object.__setattr__(self, 'lazy_self', lazy_self)
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39
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40 def __getattribute__(self, name):
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41 # type: (Any) -> Any
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42 lazy_self = object.__getattribute__(self, 'lazy_self')
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43 if name == 'lazy_self':
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44 return lazy_self
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45 return getattr(lazy_self(), name)
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46
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47 def __setattr__(self, name, value):
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48 # type: (Any, Any) -> None
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49 setattr(self.lazy_self(), name, value)
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50
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51
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52 RegExp = partial(LazyEval, re.compile)
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53
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54
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55 # originally as comment
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56 # https://github.com/pre-commit/pre-commit/pull/211#issuecomment-186466605
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57 # if you use this in your code, I suggest adding a test in your test suite
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58 # that check this routines output against a known piece of your YAML
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59 # before upgrades to this code break your round-tripped YAML
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60 def load_yaml_guess_indent(stream, **kw):
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61 # type: (StreamTextType, Any) -> Any
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62 """guess the indent and block sequence indent of yaml stream/string
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63
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64 returns round_trip_loaded stream, indent level, block sequence indent
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65 - block sequence indent is the number of spaces before a dash relative to previous indent
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66 - if there are no block sequences, indent is taken from nested mappings, block sequence
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67 indent is unset (None) in that case
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68 """
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69 from .main import round_trip_load
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70
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71 # load a yaml file guess the indentation, if you use TABs ...
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72 def leading_spaces(l):
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73 # type: (Any) -> int
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74 idx = 0
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75 while idx < len(l) and l[idx] == ' ':
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76 idx += 1
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77 return idx
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78
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79 if isinstance(stream, text_type):
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80 yaml_str = stream
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81 elif isinstance(stream, binary_type):
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82 yaml_str = stream.decode('utf-8') # most likely, but the Reader checks BOM for this
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83 else:
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84 yaml_str = stream.read()
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85 map_indent = None
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86 indent = None # default if not found for some reason
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87 block_seq_indent = None
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88 prev_line_key_only = None
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89 key_indent = 0
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90 for line in yaml_str.splitlines():
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91 rline = line.rstrip()
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92 lline = rline.lstrip()
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93 if lline.startswith('- '):
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94 l_s = leading_spaces(line)
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95 block_seq_indent = l_s - key_indent
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96 idx = l_s + 1
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97 while line[idx] == ' ': # this will end as we rstripped
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98 idx += 1
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99 if line[idx] == '#': # comment after -
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100 continue
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101 indent = idx - key_indent
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102 break
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103 if map_indent is None and prev_line_key_only is not None and rline:
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104 idx = 0
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105 while line[idx] in ' -':
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106 idx += 1
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107 if idx > prev_line_key_only:
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108 map_indent = idx - prev_line_key_only
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109 if rline.endswith(':'):
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110 key_indent = leading_spaces(line)
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111 idx = 0
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112 while line[idx] == ' ': # this will end on ':'
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113 idx += 1
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114 prev_line_key_only = idx
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115 continue
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116 prev_line_key_only = None
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117 if indent is None and map_indent is not None:
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118 indent = map_indent
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119 return round_trip_load(yaml_str, **kw), indent, block_seq_indent
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120
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121
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122 def configobj_walker(cfg):
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123 # type: (Any) -> Any
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124 """
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125 walks over a ConfigObj (INI file with comments) generating
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126 corresponding YAML output (including comments
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127 """
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128 from configobj import ConfigObj # type: ignore
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129
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130 assert isinstance(cfg, ConfigObj)
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131 for c in cfg.initial_comment:
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132 if c.strip():
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133 yield c
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134 for s in _walk_section(cfg):
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135 if s.strip():
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136 yield s
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137 for c in cfg.final_comment:
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138 if c.strip():
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139 yield c
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140
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141
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142 def _walk_section(s, level=0):
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143 # type: (Any, int) -> Any
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144 from configobj import Section
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145
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146 assert isinstance(s, Section)
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147 indent = u' ' * level
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148 for name in s.scalars:
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149 for c in s.comments[name]:
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150 yield indent + c.strip()
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151 x = s[name]
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152 if u'\n' in x:
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153 i = indent + u' '
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154 x = u'|\n' + i + x.strip().replace(u'\n', u'\n' + i)
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155 elif ':' in x:
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156 x = u"'" + x.replace(u"'", u"''") + u"'"
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157 line = u'{0}{1}: {2}'.format(indent, name, x)
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158 c = s.inline_comments[name]
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159 if c:
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160 line += u' ' + c
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161 yield line
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162 for name in s.sections:
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163 for c in s.comments[name]:
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164 yield indent + c.strip()
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165 line = u'{0}{1}:'.format(indent, name)
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166 c = s.inline_comments[name]
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167 if c:
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168 line += u' ' + c
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169 yield line
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170 for val in _walk_section(s[name], level=level + 1):
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171 yield val
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172
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173
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174 # def config_obj_2_rt_yaml(cfg):
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175 # from .comments import CommentedMap, CommentedSeq
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176 # from configobj import ConfigObj
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177 # assert isinstance(cfg, ConfigObj)
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178 # #for c in cfg.initial_comment:
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179 # # if c.strip():
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180 # # pass
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181 # cm = CommentedMap()
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182 # for name in s.sections:
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183 # cm[name] = d = CommentedMap()
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184 #
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185 #
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186 # #for c in cfg.final_comment:
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187 # # if c.strip():
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188 # # yield c
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189 # return cm