What is Timeouterror() from exc TimeoutError in Python?
In Python’s asyncio tasks, a timeout error is raised when an operation takes longer than the allotted time to finish. This error is raised to show that the job was not completed in the allotted amount of time. It is often used in asynchronous programming to deal with tasks that take too long to finish. Developers can catch this problem and use the right way to deal with it or try again to manage timeouts well in their asyncio programs.
Error Syntax
TimeoutError() from exc TimeoutError
below, are the reasons for the occurrence of Python TimeoutError() from exc TimeoutError in Python:
- Slow Operations
- Infinite Loops
Slow Operations
In below code the fetch_data function pretends to wait for a slow internet connection by pausing for 2 seconds. In main, a timeout of 1 second is set using asyncio.TimeoutError. When asyncio.wait_for waits for fetch_data to finish, it takes too long, so it gives a TimeoutError.
import asyncio
async def my_task():
await asyncio.sleep(3) # Simulate some long-running operation
return "Task completed"
async def main():
result = await asyncio.wait_for(my_task(), timeout=2)
print(result)
asyncio.run(main())
Output:
File "<main.py>", line 8, in main
File "/usr/local/lib/python3.11/asyncio/tasks.py", line 502, in wait_for
raise exceptions.TimeoutError() from exc TimeoutError
Infinite Loops
In below code the Infinite_loop is a function that keeps running forever. In main, a timeout of 2 seconds is set, but because the loop never ends, it takes too long, resulting in a TimeoutError.
import asyncio
async def my_task():
while True:
await asyncio.sleep(1) # Infinite loop, simulating ongoing task
async def main():
await asyncio.wait_for(my_task(), timeout=2)
asyncio.run(main())
Output:
File "<main.py>", line 8, in main
File "/usr/local/lib/python3.11/asyncio/tasks.py", line 502, in wait_for
raise exceptions.TimeoutError() from exc TimeoutError
How to Fix – Timeouterror() from exc TimeoutError in Python
We can prevent our program from getting stalled indefinitely and gracefully handle it by setting timeouts for external operations or long-running computations. Timeouts help in managing the execution of tasks and ensuring that our program remains responsive. In this article, we will see how to catch Timeouterror() from exc TimeoutError in Python.