tkinter - Run a process while other process is running python

Question

This question already has an answer here: question from:https://stackoverflow.com/questions/65846377/run-a-process-while-other-process-is-running-python

Answer 1

The call function blocks until the sub-process exits. Therefore, the GUI event loop is prevented from running. Try spawning it as a background process.

proc = subprocess.Popen(["notepad++.exe", "-n", line, file])