it's an external package - i.e. not part of Python standard library. You need to install it first from PyPI. There are installation instructions in the documentation link. Use pip:
pip install python-docx
If you can't explain it to a six year old, you don't understand it yourself, Albert Einstein
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs