You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
33 lines
1014 B
Python
33 lines
1014 B
Python
7 years ago
|
"""
|
||
|
|
Here is a trivial example of us awaiting the result of another coroutine. We did this by using the await
|
||
|
|
keyword before calling it. The await keyword gives control back to the event loop and registers add_42(23) function
|
||
|
|
and arguments call to the Task Queue allowing the event loop to schedule other tasks. In this case this
|
||
|
|
single function is the only Task on the Queue so it will be picked up and executed. Once executed the result is
|
||
|
|
returned to hello_async allowing it to be resumed by the event loop scheduler.
|
||
|
|
"""
|
||
|
|
|
||
|
|
import asyncio
|
||
|
|
|
||
|
|
|
||
|
|
async def add_42(number):
|
||
|
|
if not isinstance(number, int):
|
||
|
|
raise ValueError("You need to supply a number to this bitch")
|
||
|
|
print("Adding 42")
|
||
|
|
return 42 + number
|
||
|
|
|
||
|
|
|
||
|
|
async def hello_async():
|
||
|
|
print("Hello async!")
|
||
|
|
co_result = await add_42(23)
|
||
|
|
return co_result
|
||
|
|
|
||
|
|
|
||
|
|
event_loop = asyncio.get_event_loop()
|
||
|
|
|
||
|
|
try:
|
||
|
|
print("Entering event loop")
|
||
|
|
result = event_loop.run_until_complete(hello_async())
|
||
|
|
print(result)
|
||
|
|
finally:
|
||
|
|
event_loop.close()
|