Asynchronous exception handling in Python

Question

I\'ve the following code using asyncio and aiohttp to make asynchronous HTTP requests.

import sys
import asyncio
import aiohttp

@a         


        

Answer 1

To debug or "handle" exceptions in callback:

Coroutine which return some result or raise exceptions:

@asyncio.coroutine
def async_something_entry_point(self):
    try:
        return self.real_stuff_which_throw_exceptions()
    except:
        raise Exception(some_identifier_here + ' ' + traceback.format_exc())

And callback:

def callback(self, future: asyncio.Future):
    exc = future.exception()
    if exc:
        # Handle wonderful empty TimeoutError exception
        if type(exc) == TimeoutError:
            self.logger(' callback exception TimeoutError')
        else:
            self.logger(" callback exception " + str(exc))

    # store your result where you want
    self.result.append(
        future.result()
    )