What Do I Do If "ModuleNotFoundError: No module named 'xxx'" Is Displayed When I Invoke a Python Script?

Symptom

When I invoke a Python script, the system displays a message indicating that the Python dependency is missing, for example, "ModuleNotFoundError: No module named 'xxx'".

Possible Cause

The required dependency does not exist in the environment.

Solution

Run the following command to install the Python dependency based on the actual operating system:

pip3 install xxx