def __create_launcher(self, run_root):
		launcher = self.__task.data['backend']['launcher']
		return self.__launcher_mgr.create_launcher(launcher, run_root)
def myfunc(first, second=None, third=Optional(5), fourth=Optional(execute=list)):
            #Equivalent: second = deoption(second, 5)
            if isinstance(second, type(None)):
                second = 5