Python：如何在现有xlsx上编写而不覆盖其他列

Question

我只想覆盖数据框上的某些列。假设df2是我的数据帧。

下面是我使用的代码。问题是，即使我将其编码为从第80列开始，它也会覆盖其他列和行。

我只希望覆盖列80及其之后的内容，但不要覆盖列80之前的内容。80是索引，而不是名称。

import pandas as pd
import xlsxwriter

df2 = pd.read_excel(r'C:\Users\RUI LEONHART\Google Drive\Shop\STOCK V2.xlsx',
    usecols=['XS1','S1','M1','L1','XL1','XXL1'])

# Create a Pandas Excel writer using XlsxWriter as the engine.
writer = pd.ExcelWriter('pandas_simple.xlsx', engine='xlsxwriter')

# Convert the dataframe to an XlsxWriter Excel object.
df2.to_excel(writer, sheet_name='Sheet1', startcol=80)

# Get the xlsxwriter objects from the dataframe writer object.
workbook  = writer.book
worksheet = writer.sheets['Sheet1']

# Close the Pandas Excel writer and output the Excel file.
writer.save()

我搜索解决方案。最接近的是这个

python: update dataframe to existing excel sheet without overwriting contents on the same sheet and other sheets

但仍会覆盖我不想要的列和行。