附加到 Excel 中的工作表会创建一个新工作表而不是附加

Question

I am trying to use this code to append a dataframe to an existing sheet in Excel, but instead of appending the new data to it, it creates a new sheet. Here is the code:

import pandas as pd
import openpyxl as op

df = ['normal_dataframe']

with pd.ExcelWriter('test.xlsx', engine='openpyxl', mode='a') as writer:
    df.to_excel(writer, sheet_name='Sheet1', header=False, index=False)

'test.xlsx' has a 'Sheet1', but when the file is appended, theres 2 sheets. 'Sheet1' and 'Sheet11'.

Answer 1

One approach with COM:

import win32com.client

xl = win32com.client.Dispatch("Excel.Application")

path = r'c:\Users\Alex20\Documents\test.xlsx'
wb = xl.Workbooks.Open(path)
ws = wb.Worksheets("Sheet1")
ws.Range("E9:F10").Value = [[9,9],[10,10]]
wb.Close(True)
xl.Quit()