[FIXED] How to suppress "coroutine was never awaited" warning?

Issue

All search results on "coroutine was never awaited" are for people who were either trying to fire-and-forget or actually did forget to await. This is not my case.

I want to use a coroutine the same way I often use generators: I'm creating it here while I have all the variables handy, but I'm not sure yet whether I'll ever need that to be run. Something like:

options = {
   'a': async_func_1(..., ...),
   'b': async_func_2(),
   'c': async_func_3(...),
}

and elsewhere:

appropriate_option = figure_the_option_out(...)
result = await options[appropriate_option]

Solution

This might help

import warnings

...

    def go(self):
        try:
            self.loop.run_until_complete(self.run())
        except Exception as e:
            print(f"  {e}")
        finally:
            with warnings.catch_warnings():
                warnings.simplefilter("ignore")
                self._clean_up()

...

where self._clean_up() causes the RuntimeWarning

You can suppress warnings temporarily as above. You can read about it more in detail at https://python.readthedocs.io/en/latest/library/warnings.html#temporarily-suppressing-warnings

Answered By - Gergely M