classPEP3131Test(unittest.TestCase):deftest_valid(self):classT:ä=1µ=2# this is a compatibility character蟒=3self.assertEquals(getattr(T,"\xe4"),1)self.assertEquals(getattr(T,"\u03bc"),2)self.assertEquals(getattr(T,'\u87d2'),3)deftest_invalid(self):try:fromtestimportbadsyntax_3131exceptSyntaxErrorass:self.assertEquals(str(s),"invalid character in identifier (badsyntax_3131.py, line 2)")else:self.fail("expected exception didn't occur")deftest_main():