How Can I Execute Python Scripts with Arguments from Another Python Script?

Executing Python Scripts from Other Python Scripts with Arguments

In Python, the need often arises to execute an external script with specific parameters or arguments. While Stack Overflow question 1186789 partially addresses this issue by invoking a single function, it fails to cater to the execution of complete scripts. Additionally, the execfile approach mentioned in the question does not allow for proper variable passing, as sys.argv in the target script remains unchanged.

To rectify this, the use of os.system is recommended:

<code class="python">import os

os.system("script2.py 1")</code>

The os.system function provides a convenient way to execute an external command from within a Python script. In the example above, it launches the script2.py script with the argument 1.

The key difference between os.system and execfile lies in their respective contexts. execfile executes code within the current execution environment, which prevents sys.argv from updating. Conversely, os.system creates a new process to run the script, ensuring that the intended arguments are passed correctly.

By employing os.system, you can seamlessly execute external scripts with specified parameters without requiring any modifications to the target script.

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