python-3.5

I have a function in python that can either return a bool or a list . Is there a way to specify the return types using type hints. For example, Is this the correct way to do it? def foo(id) -> list or bool: ... Bhargav Rao From the documentation class typing.Union Union type; Union[X, Y] means either X or Y. Hence the proper way to represent more than one return data type is from typing import Union def foo(client_id: str) -> Union[list,bool] But do note that typing is not enforced. Python continues to remain a dynamically-typed language. The annotation syntax has been developed to help during

Hi I am working on Django project where I need to create a form for inputs. I tried to import reverse from django.core.urlresolvers . I got an error: line 2, in from django.core.urlresolvers import reverse ImportError: No module named 'django.core.urlresolvers' I am using Python 3.5.2, Django 2.0 and MySQL. knbk Django 2.0 removes the django.core.urlresolvers module, which was moved to django.urls in version 1.10. You should change any import to use django.urls instead, like this: from django.urls import reverse Note that Django 2.0 removes some features that previously were in django.core

I want to use type hints in my current Python 3.5 project. My function should receive a function as parameter. How can I specify the type function in my type hints? import typing def my_function(name:typing.AnyStr, func: typing.Function) -> None: # However, typing.Function does not exist. # How can I specify the type function for the parameter `func`? # do some processing pass I checked PEP 483 , but could not find a function type hint there. Jim Fasarakis Hilliard As @jonrsharpe noted in a comment, this can be done with typing.Callable : from typing import AnyStr, Callable def my_function

I'm migrating from tornado to asyncio , and I can't find the asyncio equivalent of tornado 's PeriodicCallback . (A PeriodicCallback takes two arguments: the function to run and the number of milliseconds between calls.) Is there such an equivalent in asyncio ? If not, what would be the cleanest way to implement this without running the risk of getting a RecursionError after a while? A. Jesse Jiryu Davis For Python versions below 3.5: import asyncio @asyncio.coroutine def periodic(): while True: print('periodic') yield from asyncio.sleep(1) def stop(): task.cancel() loop = asyncio.get_event