The done() method of Task class in asyncio

Overview:

An asyncio.Task object is marked done and the method done() returns True if the wrapped coroutine has exited.
The exit of the coroutine could be due to any of these reasons:
- The coroutine has been fully executed
- A call to the method cancel()
- The coroutine has raised an exception
It returns False when the wrapped coroutine is in suspended or in running state.

Example:

# Example Python program that prints
# the status of a asyncio.Task before
# and after it is complete
import asyncio

# Define coroutine
async def cr():
   for i in range(0, 10, 2):
       print(i)
       await asyncio.sleep(0)

# A coroutine that will bootstrap a Task
async def main():
   tsk = asyncio.create_task(cr())

    # Task is not done yet
   print("Task done:%s"%tsk.done())
   await tsk

# Task is done now
print("Task done:%s"%tsk.done())

# Run the coroutine main() in an asyncio event loop
l = asyncio.new_event_loop()
asyncio.set_event_loop(l)
asyncio.run(main())

Output:

Task done:False

Task done:True