How to Fix "Blender Python Editor Shows 'ModuleNotFoundError' Error"

A ModuleNotFoundError in Blender's Python Editor indicates that Python is unable to locate the library or module you are attempting to import.

This is typically due to missing installations, incorrect paths, or issues with Blender’s Python environment.

Here’s how you can resolve this issue: First, confirm that the module you are trying to import is correctly installed in Blender’s Python environment.

Blender uses its own internal Python interpreter, so libraries installed for the system Python won’t be available in Blender’s environment by default.

To install the module within Blender’s environment, open Blender’s Python Console by navigating to Window > Toggle System Console, and then use the pip command: !pip install <module_name>.

For instance, if you’re trying to use numpy, you would type !pip install numpy.

If you can’t install using pip directly, download the module from the official Python Package Index (PyPI) and install it manually by placing it in the Blender Python directory.

Check Blender’s Python directory (e.g., <Blender_install_directory>/2.xx/python/lib/python3.x/site-packages/) for any missing files.

Another reason could be that you’re using an incorrect import statement.

Double-check the module’s documentation for the correct name and case.

Python is case-sensitive, so import numpy and import NumPy will produce different results.

If you’re certain the module is installed correctly, try running Blender from a terminal or command prompt, as this can sometimes show detailed error messages that can help identify missing dependencies or installation issues.

Sometimes, Blender’s Python environment may not match the Python version required by the module.

To check the Python version used by Blender, go to the Python Console and type import sys; print(sys.version).

If necessary, install a compatible version of the module for Blender’s Python version.

In rare cases, Blender may be configured to use a non-standard Python interpreter, causing module resolution problems.

Verify Blender’s internal Python interpreter settings in Edit > Preferences > File Paths.

By following these steps, you should be able to fix the ModuleNotFoundError and ensure your Python modules are available in Blender.