Python Openpyxl - 在 write_only 电子表格中添加列

Question

I'm using Python and openpyxl library, but, I'm not able to use the insert_cols() function in openpyxl when my spreadsheet is in write_only=True mode. So, basically, I just want to add a new column to my spreadsheet when it's in write_only=True mode.

I'm able to use insert_cols() when loading the workbook by load_workbook() , but, not when I'm using the write_only mode. I have to use the write_only mode because my spreadsheets are quite large.

Any ideas on how to add a new column are appreciated.

Thank you.

This is my code:

import openpyxl
from openpyxl import Workbook
from openpyxl import load_workbook

wb = load_workbook(filename=r'path\myExcel.xlsx', read_only=True)
ws = wb['PC Details']

wb_output = Workbook(write_only=True)
ws_output = wb_output.create_sheet(title='PC Details')


for row in ws.rows:
    rowInCorrectFormat = [cell.value for cell in row]
    ws_output.append(rowInCorrectFormat)
    for cell in row:
        print(cell.value)

### THIS IS THE PART OF THE CODE WHICH DOES NOT WORK
ws_output.insert_cols(12)
ws_output['L5'] = 'OK or NOT GOOD?'
###

wb_output.save(r'path\test_Output_optimized.xlsx')

This is the exact error that I'm getting:

ws_output.insert_cols(12)
AttributeError: 'WriteOnlyWorksheet' object has no attribute 'insert_cols'

Answer 1

The problem here lies in the flag write_only = True . Workbooks created by this flag set to true are different from regular Workbooks as you can look below.

Functions like insert_cols & insert_rows also do not work for such workbooks.

Possible solutions might be to not use this flag or use the ways suggested in the official documentation for adding data to the sheet.

For working with workbooks you might also find this article interesting. https://medium.com/aubergine-solutions/working-with-excel-sheets-in-python-using-openpyxl-4f9fd32de87f

You can read more in the official documentation. https://openpyxl.readthedocs.io/en/stable/optimized.html