python - Can subprocess.call be invoked without waiting for process to finish?

Question

I'm currently using subprocess.call() to invoke another program, but it blocks the executing thread until that program finishes. Is there a way to simply launch that program without waiting for return?

Answer 1

Use subprocess.Popen instead of subprocess.call:

process = subprocess.Popen(['foo', '-b', 'bar'])

subprocess.call is a wrapper around subprocess.Popen that calls communicate to wait for the process to terminate. See also What is the difference between subprocess.popen and subprocess.run.