Pmw.py 文件源码

def _getValidatorFunc(self, validator, index):
        # Search the extra and standard validator lists for the
        # given 'validator'.  If 'validator' is an alias, then
        # continue the search using the alias.  Make sure that
        # self-referencial aliases do not cause infinite loops.

        extraValidators = self['extravalidators']
        traversedValidators = []

        while 1:
            traversedValidators.append(validator)
            if extraValidators.has_key(validator):
                validator = extraValidators[validator][index]
            elif _standardValidators.has_key(validator):
                validator = _standardValidators[validator][index]
            else:
                return validator
            if validator in traversedValidators:
                return validator