Unable to call async functions from a python file

[osancus]

Unable to call 'sub' function

async def sub(a, b):
  return a - b

Error:
sys:1: RuntimeWarning: coroutine 'sub' was never awaited
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
err : Unsupported type returned (coroutine), only pure Python types are supported.

Unable to call 'execute' function

def execute(a, b):
  loop = asyncio.get_event_loop()
  answer = loop.run_until_complete(sub(a,b))
  print(answer)
  loop.close()

Error:
Segmentation fault: 11

[beeing]

Not sure if this may help - https://stackoverflow.com/a/62383036