How to check if a process is alive in Python on Linux?

Question

I have a process id in Python. I know I can kill him with os.kill (), but how do I check if he is alive? Is there a built-in function or do I need to go into a shell?

Answer 1

Use the subprocessmodule to start the process. There is a function proc.poll () - it returns Noneif the process is still alive, otherwise it returns a return code for the process.

http://docs.python.org/library/subprocess.html

Answer 2

os.kill does not kill processes, it sends them signals (it is poorly named).

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. man 2 kill.

, , SIGCHLD, , wait, .