167     def __init__(self, expected, test_case, expected_regex=None):  argument
171         if expected_regex is not None:
172             expected_regex = re.compile(expected_regex)
173         self.expected_regex = expected_regex
234         if self.expected_regex is None:
237         expected_regex = self.expected_regex
238         if not expected_regex.search(str(exc_value)):
240                      expected_regex.pattern, str(exc_value)))
279             if (self.expected_regex is not None and
280                 not self.expected_regex.search(str(w))):
290                      self.expected_regex.pattern, str(first_matching)))
1262     def assertRaisesRegex(self, expected_exception, expected_regex,  argument
1275         context = _AssertRaisesContext(expected_exception, self, expected_regex)
1278     def assertWarnsRegex(self, expected_warning, expected_regex,  argument
1294         context = _AssertWarnsContext(expected_warning, self, expected_regex)
1297     def assertRegex(self, text, expected_regex, msg=None):  argument
1299         if isinstance(expected_regex, (str, bytes)):
1300             assert expected_regex, "expected_regex must not be empty."
1301             expected_regex = re.compile(expected_regex)
1302         if not expected_regex.search(text):
1304                 expected_regex.pattern, text)