def assertTrue(self, expr, msg=None):
        """Check that the expression is true."""
        if not expr:
            msg = self._formatMessage(msg, safe_repr(expr) % "%s is not true")
            raise self.failureException(msg)
dataset/ETHPy150Open kleientertainment/ds_mod_tools/pkg/win32/Python27/Lib/unittest/case.py/TestCase.assertTrue/swapped operands of `%`