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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_setup(cls):
 """Get package setup."""

        try:
            with open("setup.py") as f:
                return SetupVisitor(ast.parse(f.read()))
        except IOError as e:
            LOG.warning("Couldn't open setup file: %s", e)
            return SetupVisitor(ast.parse(""))