Run child processes as different user from a long running Python process

Title: Running Child Processes as Different Users in Python
Introduction:
In certain scenarios, you may need to run child processes within a long-running Python application as different users, especially when dealing with security or privilege separation. This tutorial will guide you through the process of running child processes with different user privileges in Python using the subprocess module and os module. We'll also cover some important considerations and best practices.
Prerequisites:
Step 1: Import Required Modules
First, import the necessary modules in your Python script. You will need the subprocess module to run child processes and the os module to manipulate user privileges.
Step 2: Define User Credentials
Before running a child process as a different user, you need to define the username and, optionally, the group that you want to switch to. In this example, we will run the child process as the user "exampleuser." You can replace this with the username you need.
Step 3: Create a Function for User Switching
Step 4: Run Child Processes as the Different User
Now, you can run child processes as the specified user by calling the switch_user() function before using the subprocess module. Here's an example:
Step 5: Handle Exceptions
When running child processes as different users, you may encounter exceptions. It's essential to handle them appropriately. For example, if the child process encounters an error or the user switching