在bash上运行python脚本时如何抑制KeyboardInterrupt输出？

Question

I decide to run a python script from my bash terminal prompt, eg running $ python my_script.py .

I then decide to press Ctrl-C to kill this active process.

Then, the process dies, and some output error comes to the terminal, that may look like:

^C
Traceback (most recent call last):
  File "<stdin>", line 3, in <module>
KeyboardInterrupt

How can I suppress this output from the bash/terminal side while still using Ctrl-C .

From this comment I learned that you can use Ctrl-\\ to quit the process, which is apparently different than Ctrl-C . It seems to suppress any output.

However, if I simply run $ python and run some code within the interactive python shell, using Ctrl-\\ will completely quit the Python shell process, while Ctrl-C just kills that code that I had just execute (like a for loop) but preserves the Python shell process.

Answer 1

You can do python script.py 2>/dev/null since you're using bash.

The 2 means it sends stderr to a special file /dev/null which is always empty, to which this script will now send its output to.

If you had no 2 , it would suppress standard output (ie stdout ) but not errors.

If you wanted to suppress both, you could do > /dev/null 2>&1 , since 1 is stdout, and stdout is now being routed to devnull.

Essentially, you are sending the error traceback, instead of to the standard stderr location (your screen), to a blank file.

Answer 2

You can use a try-except block:
Here in the below code, I am just printing some numbers as an example, replace that with your code:

---

import sys
try:
    # your code
    for i in range(1000000):
        print(i)

except KeyboardInterrupt:
    sys.exit(0)