The Subprocess in Python can be useful if you've ever intended to streamline your command-line scripting or utilize Python alongside command-line apps-or any applications, for that matter.Using subprocesses in Python, you can also obtain exit codes and input, output, or error streams.So, you may use a subprocess in Python to run external applications from a git repository or code from C or C++ programs.And it enables the user to launch new programs right from the current Python program thanks to the subprocess module. Subprocess in Python is used to run new programs and scripts by spawning new processes.