python-docx to change table style

change_table_style.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
opens a docx file, replace ALL table style(*) and save on same file
mainly for pandoc exported docx file

(*) the applying style must be pre-defined in given file
Applies MIT License - 2017 K4ZUKI(K4zuki@github.com)
"""

import docx # python-docx 0.8.6+

docu = docx.Document("file.docx")
for tbl in docu.tables:
    tbl.style = "Table Grid"
    
docu.save("file.docx")