How can I get the return value of a process in Python

Sometimes, when you run an external process in Python, you may want to capture its return value (also known as the exit code or status code) to determine whether the process completed successfully or encountered an error. This tutorial will guide you through various methods to obtain the return value of a process in Python, along with code examples.
The subprocess module is a powerful and versatile way to execute external processes in Python. It also allows you to capture the return value of the executed process.
Here's an example of how to use the subprocess module to run an external command and obtain its return value:
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