Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/gxformat2/_yaml.py @ 4:79f47841a781 draft

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"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:47:39 -0400
parents 26e78fe6e8c4
children
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1 """YAML loading utilities for gxformat2."""
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2 from collections import OrderedDict
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3
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4 try:
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5 from galaxy.model.custom_types import MutationDict
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6 except ImportError:
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7 MutationDict = None
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8 import yaml
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11 def ordered_load(stream, Loader=yaml.SafeLoader, **kwds):
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12 """Safe and ordered load of YAML from stream."""
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13 class OrderedLoader(Loader):
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14 pass
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15
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16 def construct_mapping(loader, node):
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17 loader.flatten_mapping(node)
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18 return OrderedDict(loader.construct_pairs(node))
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19
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20 OrderedLoader.add_constructor(
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21 yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
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22 construct_mapping)
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23
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24 return yaml.load(stream, OrderedLoader, **kwds)
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27 def ordered_dump(data, stream=None, Dumper=yaml.SafeDumper, **kwds):
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28 """Safe and ordered dump of YAML to stream."""
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29 class OrderedDumper(Dumper):
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30 pass
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31
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32 def _dict_representer(dumper, data):
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33 return dumper.represent_mapping(
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34 yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
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35 list(data.items()))
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36 OrderedDumper.add_representer(OrderedDict, _dict_representer)
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37 if MutationDict is not None:
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38 OrderedDumper.add_representer(MutationDict, _dict_representer)
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39
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40 return yaml.dump(data, stream, OrderedDumper, **kwds)
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41
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42
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43 __all__ = (
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44 'ordered_dump',
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45 'ordered_load',
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46 )