How Can I Run One Python File from Another?

Running One Python File from Another

In scenarios where multiple Python files are involved, it becomes necessary to execute one file from within another. Here are various methods to accomplish this:

1. Importing as a Module:

The preferred method is to treat the other Python file as a module. This involves importing it:

import file

This approach is secure, efficient, and ensures proper code reuse. If your imported file is named file.py, omit the .py extension in the import statement.

2. Exec Command (Unsafe):

This is a less desirable method and is generally not recommended due to its potential for security risks. However, here's how to use it:

Python 2:

execfile('file.py')

Python 3:

exec(open('file.py').read())

3. Spawning a Shell Process:

This method is used as a last resort and should be avoided if possible:

import os
os.system('python file.py')

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