How Can I Implement a Time Limit for a Function Call to Prevent Blocking?

Implementing a Time-Limited Function Execution

In your code, you encounter a socket-related function call from an external module that occasionally blocks for unacceptable durations. You seek a solution to limit the execution time of this function call. A viable approach involves utilizing another thread.

A refined version of the accepted answer leverages the with statement to enhance the syntax of the timeout function:

import signal
from contextlib import contextmanager

class TimeoutException(Exception): pass

@contextmanager
def time_limit(seconds):
    def signal_handler(signum, frame):
        raise TimeoutException("Timed out!")
    signal.signal(signal.SIGALRM, signal_handler)
    signal.alarm(seconds)
    try:
        yield
    finally:
        signal.alarm(0)

try:
    with time_limit(10):
        long_function_call()
except TimeoutException as e:
    print("Timed out!")

By incorporating this code, you can manage time limits for function calls and effectively handle timeout exceptions.

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