def test_str_strip(self):
"""Check matches the python string strip method."""
self._test_method("strip")
s = Seq(" ACGT ")
m = MutableSeq(" ACGT ")
self.assertEqual(s.strip(), "ACGT")
self.assertRaises(TypeError, s.strip, 7)
self.assertEqual(s, " ACGT ")
self.assertEqual(m.strip(), "ACGT")
self.assertRaises(TypeError, m.strip, 7)
self.assertEqual(m, " ACGT ")
self.assertEqual(m.strip(inplace=True), "ACGT")
self.assertEqual(m, "ACGT")
