[ Python 常見問題 ] How do I capture SIGINT in Python?

Source From Here 
Question 
I'm working on a python script that starts several processes and database connections. Every now and then I want to kill the script with a Ctrl+C signal, and I'd like to do some cleanup. In Perl I'd do this: 

view plaincopy to clipboardprint?

1. $SIG{'INT'} = 'exit_gracefully';  
2.   
3. sub exit_gracefully {  
4.     print "Caught ^C \n";  
5.     exit (0);  
6. }  

How do I do the analogue of this in Python? 

How-To 
Register your handler with signal.signal like this: 

view plaincopy to clipboardprint?

1. #!/usr/bin/env python  
2. import signal  
3. import sys  
4. def signal_handler(signal, frame):  
5.         print('You pressed Ctrl+C!')  
6.         sys.exit(0)  
7. signal.signal(signal.SIGINT, signal_handler)  
8. print('Press Ctrl+C')  
9. signal.pause()  

Code adapted from here. 

More documentation on module signal can be found here. 

Supplement 
* Tutorialspoint - Unix - Signals and Traps