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sE Parser for the environment markers micro-language defined in PEP 345.iNi ( t python_implementationt string_types( t in_venvt interprett Evaluatorc B s^ e Z d Z i d d 6d d 6d d 6d d 6d d
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A limited evaluator for Python expressions.
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Initialise an instance.
:param context: If specified, names are looked up in this mapping.
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Get the part of the source which is causing a problem.
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Get a handler for the specified AST node type.
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Interpret a marker and return a result depending on environment.
:param marker: The marker to interpret.
:type marker: str
:param execution_context: The context used for name lookup.
:type execution_context: mapping
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