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Flake8 API

flake8.engine

flake8.hooks

flake8.main

flake8.util

For AST checkers, this module has the iter_child_nodes function and handles compatibility for all versions of Python between 2.5 and 3.3. The function was added to the ast module in Python 2.6 but is redefined in the case where the user is running Python 2.5