def METHOD_NAME(self):
    try:
        raise KeyError('blah')
    except KeyError:
        type_, value, tb = sys.exc_info()
        traceback_fmt = 'Traceback (most recent call last):\n' + \
                        ''.join(traceback.format_tb(tb))
        file_ = StringIO()
        traceback_print(tb, file_)
        python_fmt  = file_.getvalue()
    else:
        raise Error("unable to create test traceback string")
    # Make sure that Python and the traceback module format the same thing
    self.assertEqual(traceback_fmt, python_fmt)
    # Make sure that the traceback is properly indented.
    tb_lines = python_fmt.splitlines()
    self.assertEqual(len(tb_lines), 3)
    banner, location, source_line = tb_lines
    self.assertTrue(banner.startswith('Traceback'))
    self.assertTrue(location.startswith('  File'))
    self.assertTrue(source_line.startswith('    raise'))