使用timeout_decorator模块进行处理，该模块提供了装饰器

[root@web1 ~]# pip install timeout_decorator

[root@web1 ~]# vim a.py
#!/usr/bin/env python3
#-*- coding: utf-8 -*-
import time
import timeout_decorator


@timeout_decorator.timeout(5)
def outer():
    time.sleep(2)
    return 2


fn = outer()
print(fn)

运行

[root@web1 ~]# python3 a.py 
2

超时的时候运行

[root@web1 ~]# python3 a.py       将a.py中的时间更改为6
Traceback (most recent call last):
  File "a.py", line 13, in <module>
    fn = outer()
  File "/usr/local/lib/python3.6/site-packages/timeout_decorator/timeout_decorator.py", line 82, in new_function
    return function(*args, **kwargs)
  File "a.py", line 9, in outer
    time.sleep(6)
  File "/usr/local/lib/python3.6/site-packages/timeout_decorator/timeout_decorator.py", line 69, in handler
    _raise_exception(timeout_exception, exception_message)
  File "/usr/local/lib/python3.6/site-packages/timeout_decorator/timeout_decorator.py", line 45, in _raise_exception
    raise exception()
timeout_decorator.timeout_decorator.TimeoutError: 'Timed Out'