Constant Duplicates

utils.py

import re


def duplicates(module):
    """Determine if the given module contains multiple definitions for the
    same constant.

    :param module: The module to check.
    """
    ret_val = set()
    constants = {}
    filename = "{0}.py".format(module.__name__)
    pattern = re.compile(r"^(?P<constant>([A-Z0-9_])+)[ \t]*=.*$")

    with open(filename) as module_py:
        for line in module_py.readlines():
            match = pattern.match(line)

            if match:
                constant = match.group("constant")
                attribute = getattr(module, constant)

                if constant in constants:
                    ret_val.add(constant)
                else:
                    constants[constant] = attribute

    return ret_val