how to write a simple Python Multi-thread task-CodePudding

I have the below simple functions:

import time

def foo():
    print(f'i am working come back in 5mins')
    time.sleep(300)

def boo():
    print(f' boo!')

def what_ever_function():
    print(f'do whatever function user input at run time.')

What I wish to do is execute foo() and then immediately execute boo() or what_ever_function() without having to wait for 300 seconds for foo() to finish.

Imagine a workflow in Ipython:

>>> foo()
i am working come back in 5mins
>>> boo()
boo!

The idea is after execute foo(), I can use the user-prompt to run another function immediately; whatever function that may be; without having to wait 300 seconds for foo() to finish.

I already tried googleing: https://docs.python.org/3/library/asyncio.html and https://docs.python.org/3/library/threading.html#

But still couldn't achieve the above task.

Any pointer or help please?

Thanks

CodePudding user response：

If you use asyncio, you should use asyncio.sleep instead of time.sleep because it would block the asycio event loop. here is a working example:

import asyncio


async def foo():
    print("Waiting...")
    await asyncio.sleep(5)
    print("Done waiting!")


async def bar():
    print("Hello, world!")


async def main():
    t1 = asyncio.create_task(foo())
    await asyncio.sleep(1)
    t2 = asyncio.create_task(bar())

    await t1, t2


if __name__ == "__main__":
    asyncio.run(main())

In this example, foo and bar run concurrently: bar does execute while foo also do.