How to use the nose2.util.name_from_args function in nose2

def _testsFromGenerator(self, event, name, generator, testCaseClass):
        try:
            for index, (func, args) in self.unpack(generator):
                method_name = util.name_from_args(name, index, args)
                setattr(testCaseClass, method_name, None)
                instance = testCaseClass(method_name)
                delattr(testCaseClass, method_name)

                def method(func=func, args=args):
                    return func(*args)
                method = functools.update_wrapper(method, func)
                setattr(instance, method_name, method)
                yield instance
        except Exception as e:
            test_name = '%s.%s.%s' % (testCaseClass.__module__,
                                      testCaseClass.__name__,
                                      name)
            yield event.loader.failedLoadTests(test_name, e)

def _generate(self, event, name, method, testCaseClass):
        names = []
        for index, argSet in enumerate_params(method.paramList):
            method_name = util.name_from_args(name, index, argSet)
            if not hasattr(testCaseClass, method_name):
                # not already generated
                def _method(self, method=method, argSet=argSet):
                    return method(self, *argSet)
                _method = functools.update_wrapper(_method, method)
                delattr(_method, 'paramList')
                setattr(testCaseClass, method_name, _method)
            names.append(method_name)
        return names

def _generateFuncTests(self, obj):
        args = {}
        setUp = getattr(obj, 'setUp', None)
        tearDown = getattr(obj, 'tearDown', None)
        if setUp is not None:
            args['setUp'] = setUp
        if tearDown is not None:
            args['tearDown'] = tearDown
        for index, argSet in enumerate_params(obj.paramList):
            def func(argSet=argSet, obj=obj):
                return obj(*argSet)
            func = functools.update_wrapper(func, obj)
            delattr(func, 'paramList')
            name = '%s.%s' % (obj.__module__, obj.__name__)
            func_name = util.name_from_args(name, index, argSet)
            yield util.transplant_class(
                ParamsFunctionCase, obj.__module__)(func_name, func, **args)