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.