coroutine

In Python, a coroutine is an object representing a computation that can be paused and resumed. Coroutines can be entered, exited, and resumed at many different points. It’s the object you get when you call a coroutine function.

To execute the code in a coroutine, you need to await it or run it in an event loop.

Example

Here’s an example of a coroutine:

>>> import asyncio

>>> async def greet(name):
...     print(f"Hello, {name}!")
...     await asyncio.sleep(1)
...     print(f"How are you?")
...

>>> async def main():
...     coroutine = greet("Pythonista")
...     await coroutine
...

>>> asyncio.run(main())
Hello, Pythonista!
How are you?

In this example, greet() is a coroutine function that uses asyncio.sleep() to simulate a non-blocking task. The main() function calls greet() to create a coroutine object that you can await.