Solving the halting problem in python

halt.py

import asyncio

loop = asyncio.get_event_loop()

# returns true if coroutine function blocks or errors, else false
async def holds(function, arg):
    # try block for catching errors
    try:
        # create a promise for the function to run in another thread
        p = loop.run_in_executor(None, await function, (arg,))
        # return if the coroutine takes more than 0.1 seconds to complete
        # by awaiting the above promise for 0.1 seconds, and returning true if
        # it didn't finish in time
        return await asyncio.wait([p], timeout=0.1)[1]
    except:
        # code errored, so return true
        return True

async def weird(f):
    if await holds(f, f):
        while True:
            pass
        else:
            return

async def main():
    # the beginning of the event loop
    print(await holds(weird, weird))

if __name__ == "__main__":
    # put main() in the event loop, then wait until it's done
    loop.run_until_complete(main())