python标准库介绍——37 signal 模块详解

==signal 模块==

你可以使用 ``signal`` 模块配置你自己的信号处理器 (signal handler),
如 [Example 3-11 #eg-3-11] 所示. 当解释器收到某个信号时, 信号处理器会立即执行. 

====Example 3-11. 使用 signal 模块====[eg-3-11]

```
File: signal-example-1.py

import signal
import time

def handler(signo, frame):
    print "got signal", signo

signal.signal(signal.SIGALRM, handler)

# wake me up in two seconds
signal.alarm(2)

now = time.time()

time.sleep(200)

print "slept for", time.time() - now, "seconds"

*B*got signal 14
slept for 1.99262607098 seconds*b*
```