def test_attributeIterconstantsIdentity(self):
        constants = list(self.FXF.iterconstants())
        self.assertIdentical(self.FXF.READ, constants[0])
        self.assertIdentical(self.FXF.WRITE, constants[1])
        self.assertIdentical(self.FXF.APPEND, constants[2])
        self.assertIdentical(self.FXF.EXCLUSIVE, constants[3])
        self.assertIdentical(self.FXF.TEXT, constants[4])
Checks a candidate number for validity according to the Luhn
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/test/test_constants.py/FlagsTests.test_attributeIterconstantsIdentity--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/_internal/django/utils/checksums.py/luhn