Change the shades of table cells in a docx 'document.xml' component.

docx_tinker1.py

import xml.etree.ElementTree as ET

ns = dict(
    ve="http://schemas.openxmlformats.org/markup-compatibility/2006",
    o="urn:schemas-microsoft-com:office:office",
    r="http://schemas.openxmlformats.org/officeDocument/2006/relationships",
    m="http://schemas.openxmlformats.org/officeDocument/2006/math",
    v="urn:schemas-microsoft-com:vml",
    wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing",
    w10="urn:schemas-microsoft-com:office:word",
    w="http://schemas.openxmlformats.org/wordprocessingml/2006/change_cell_shade",
    wne="http://schemas.microsoft.com/office/word/2006/wordml",
    )


def change_cell_shade(documentPath, oldColor, newColor):
    """Change the shades of table cells in a docx 'document.xml' component.

    Precondidtion:
        'document.xml' is extracted from the .docx file.

    Postcondition:
        Cell shades have been changed from oldColor to newColor. 
        Now you can replace 'document.xml' in your .docx file.
    """
    for namespace in ns:
        ET.register_namespace(namespace, ns[namespace])
    tree = ET.parse(documentPath)
    for xmlElement in tree.iter():
        xmlCell = xmlElement.find('w:tcPr', ns)
        if xmlCell is not None:
            xmlShade = xmlCell.find('w:shd', ns)
            if xmlShade is not None:
                if xmlShade.attrib.get(f'{{{ns["w"]}}}fill', '') == oldColor:
                    xmlShade.attrib[f'{{{ns["w"]}}}fill'] = newColor
    tree.write(documentPath, xml_declaration=True, encoding='utf-8')


if __name__ == '__main__':
    documentPath = 'document.xml'
    oldColor = 'FFC000'
    newColor = '00C0FF'
    change_cell_shade(documentPath, oldColor, newColor)