Is it possible to run only a single step of the asyncio event loop

Question

I\'m working on a simple graphical network application, using asyncio and tkinter. I\'m running into the problem of combining the asyncio event loop with Tk\'s mainloop. If

Answer 1

The missing of public method like loop.run_once() is intentional. Not every supported event loop has a method to iterate one step. Often underlying API has methods for creating event loop and running it forever but emulating single step may be very ineffective.

If you really need it you may implement single-step iteration easy:

import asyncio


def run_once(loop):
    loop.call_soon(loop.stop)
    loop.run_forever()


loop = asyncio.get_event_loop()

for i in range(100):
    print('Iteration', i)
    run_once(loop)