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The for package in required_packages: install_and_import(package) loop is placed outside of the function to allow the main part of the script to handle the iteration and control flow. Here's why:

1. Separation of Concerns: The "install_and_import " function is responsible for a single task—checking if a package is installed and installing it if necessary. Keeping the loop outside ensures the function remains focused and reusable.
2. Modular Code: By placing the loop outside, the function can be called multiple times in different contexts. You can reuse "install_and_import" without modifying the function itself.
3. Readability: It makes the script easier to read and understand. The main script flow is clear, showing the list of required packages and iterating over them.

In this script, the function is defined once, and the loop calls it for each package. This structure keeps your code organized and maintainable. If you have other functions or more packages to check, you can easily extend it without changing the core function.