The following code

#!/usr/bin/python
# coding:utf-8
import docx
def main():
    filepath = 'test.docx'
    filepath1 = 'wtest.docx'
    newdocx = docx.Document(filepath)
    table = newdocx.tables
    for oTable in table:
        rows_num = len(oTable.rows)
        columns_num = len(oTable.columns)
        cell = oTable.cell(3, 0)
        # cell.add_paragraph("a")
        cell.text = ""
        cell.paragraphs[-1].runs[0].add_picture('t1.jpg')
        print(rows_num)
        print(columns_num)
        newdocx.save(filepath1)
if __name__ == '__main__':
    main()