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35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
import decimal
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from yaml.composer import Composer
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from yaml.constructor import SafeConstructor
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from yaml.parser import Parser
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from yaml.reader import Reader
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from yaml.resolver import Resolver
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from yaml.scanner import Scanner
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class DecimalSafeConstructor(SafeConstructor):
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"""Special constructor to override construct_yaml_float() in order to cast "Decimal" types to the value"""
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def construct_yaml_float(self, node):
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value = super().construct_yaml_float(node)
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# We force the string representation of the float here to avoid things like:
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# In [11]: decimal.Decimal(10.11)
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# Out[11]: Decimal('10.1099999999999994315658113919198513031005859375')
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return decimal.Decimal(f"{value}")
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DecimalSafeConstructor.add_constructor(
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"tag:yaml.org,2002:float", DecimalSafeConstructor.construct_yaml_float
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)
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class DecimalSafeLoader(Reader, Scanner, Parser, Composer, DecimalSafeConstructor, Resolver):
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def __init__(self, stream):
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Reader.__init__(self, stream)
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Scanner.__init__(self)
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Parser.__init__(self)
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Composer.__init__(self)
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DecimalSafeConstructor.__init__(self)
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Resolver.__init__(self)
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