CONTROL + C is the magic key combination to stop any execution at the command line. The execution stops immediately and in worst case you see something like ^C as the output of your running command.
If you stop the execution of any Python-Program, the output will be a bit unordinary and in the most cases, annoying. Because your Terminal gets flooded and you will get an Exception:
^CTraceback (most recent call last): File "garbage_collector.py", line 5, in <module> time.sleep(200) KeyboardInterrupt
In this example you see both of the described outputs the interruption ^C and the python exception. Personally I don’t like this kind of exception and always keep the eye on it to prevent the output of KeyboardInterrupt-Exception.
The following ways are really good for production and non production usage:
#!/usr/bin/env python3 # Header of the python script import sys import [..] # Catch the KeyboardInterrupt def catchthesignal(signal, frame): sys.exit(0) signal.signal(signal.SIGINT, catchthesignal) # The main logic of the script ...
The less elegant way is to use a try/except around your main logic, but this works not always as expected so the above example works like a charm :)
try: while True: main_logic() except KeyboardInterrupt: print("KeyboardInterrupt has been catched!")