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# Test asyncio.wait_for
try:
import uasyncio as asyncio
except ImportError:
try:
import asyncio
except ImportError:
print("SKIP")
raise SystemExit
async def task(id, t):
print("task start", id)
await asyncio.sleep(t)
print("task end", id)
return id * 2
async def task_catch():
print("task_catch start")
try:
await asyncio.sleep(0.2)
except asyncio.CancelledError:
print("ignore cancel")
print("task_catch done")
async def task_raise():
print("task start")
raise ValueError
async def main():
# When task finished before the timeout
print(await asyncio.wait_for(task(1, 0.01), 10))
# When timeout passes and task is cancelled
try:
print(await asyncio.wait_for(task(2, 10), 0.01))
except asyncio.TimeoutError:
print("timeout")
# When timeout passes and task is cancelled, but task ignores the cancellation request
try:
print(await asyncio.wait_for(task_catch(), 0.1))
except asyncio.TimeoutError:
print("TimeoutError")
# When task raises an exception
try:
print(await asyncio.wait_for(task_raise(), 1))
except ValueError:
print("ValueError")
# Timeout of None means wait forever
print(await asyncio.wait_for(task(3, 0.1), None))
print("finish")
asyncio.run(main())
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