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    ast
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    The `ast` module helps Python applications to process trees of the Python
    abstract syntax grammar.  The abstract syntax itself might change with
    each Python release; this module helps to find out programmatically what
    the current grammar looks like and allows modifications of it.

    An abstract syntax tree can be generated by passing `ast.PyCF_ONLY_AST` as
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    function from this module.  The result will be a tree of objects whose
    classes all inherit from `ast.AST`.

    A modified abstract syntax tree can be compiled into a Python code object
    using the built-in `compile()` function.

    Additionally various helper functions are provided that make working with
    the trees simpler.  The main intention of the helper functions and this
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    :copyright: Copyright 2008 by Armin Ronacher.
    :license: Python License.
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