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Parse enough of a Python file to recognize imports and class and
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where module is the name of a Python module, and path is an optional
list of directories where the module is to be searched.  If present,
path is prepended to the system search path sys.path.  The return value
is a dictionary.  The keys of the dictionary are the names of the
classes and functions defined in the module (including classes that are
defined via the from XXX import YYY construct).  The values are
instances of classes Class and Function.  One special key/value pair is
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contains the package search path.

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The 'children' attribute is a dictionary mapping names to objects.

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Instances of Class describe classes with the attributes from _Object,
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    methods -- mapping of method names to beginning line numbers.
If the name of a super class is not recognized, the corresponding
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