python assert equal with ellipsis

gistfile1.py

import unittest
import re

class BaseTest(unittest.TestCase):
    def assertEqualEllipsis(self, first, second, ellipsis_marker='...', msg=None):
        """
        
        Example :

            >>> self.assertEqualEllipsis('foo123bar', 'foo...bar')

        """
        if ellipsis_marker not in second:
            return first == second

        if (
            re.match(
                re.escape(second).replace(re.escape(ellipsis_marker), '(.*?)'),
                first,
                re.M | re.S
            ) is None
        ):
            self.assertMultiLineEqual(
                first,
                second,
                msg
            )