out_files = list(itertools.chain(*unpaired_files))
    for items in itertools.product(*new_files):
        if items and self._compare_multiple_dicts_except(all_exceptions, *items):

def _compare_multiple_dicts_except(self, exceptions, *dicts):
    keys = []
    for d in dicts:
        keys.append(
            sorted([key for key in d.keys() if key not in exceptions]))
    if not all(x == keys[0] for x in keys):
        return False
    for key in keys[0]:
        items = [d[key] for d in dicts]
        if not all(x == items[0] for x in items):
            return False
    return True

>>> _compare_multiple_dicts_except(['a', 'b'], {'a': 1, 'c': 3, 'd': 4}, {'a': 2, 'c': 3, 'd': 4})
True
>>> _compare_multiple_dicts_except(['a', 'b'], {'a': 1, 'c': 3, 'd': 4}, {'c': 4, 'd': 4})
False