def __iter__(self):
        raise NotImplementedError
If the C{pwd} module isn't present, L{_pwdGetByName} returns C{None}.
dataset/ETHPy150Open nicolaiarocci/cerberus/cerberus/errors.py/BaseErrorHandler.__iter__--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/conch/test/test_checkers.py/HelperTests.test_pwdGetByNameWithoutPwd