No module named openpyxl

The error message "No module named 'openpyxl'" indicates that the Python module 'openpyxl' is not installed on your system.

Openpyxl is a Python library for reading and writing Excel (xlsx/xlsm/xltx/xltm) files. In order to use it in your Python code, you need to install it first.

To install openpyxl, you can use pip, Python's package manager, by running the following command in your terminal or command prompt:

pip install openpyxl

If you are using Python 3, you might need to use pip3 instead of pip:

pip3 install openpyxl

After installing openpyxl, you should be able to import it in your Python code without any errors.