如何将数据框追加到已有的excel表中？

import pandas as pd
from openpyxl import load_workbook

excel_file = 'path/to/excel_file.xlsx'
df_existing = pd.read_excel(excel_file)

df_new = pd.DataFrame({'Column1': [value1, value2, ...], 'Column2': [value1, value2, ...], ...})

with pd.ExcelWriter(excel_file, engine='openpyxl', mode='a') as writer:
    writer.book = load_workbook(excel_file)
    writer.sheets = dict((ws.title, ws) for ws in writer.book.worksheets)
    df_new.to_excel(writer, sheet_name='Sheet1', startrow=df_existing.shape[0]+1, header=False, index=False)

import pandas as pd
from openpyxl import load_workbook

excel_file = 'path/to/excel_file.xlsx'
df_existing = pd.read_excel(excel_file)

df_new = pd.DataFrame({'Column1': [value1, value2, ...], 'Column2': [value1, value2, ...], ...})

with pd.ExcelWriter(excel_file, engine='openpyxl', mode='a') as writer:
    writer.book = load_workbook(excel_file)
    writer.sheets = dict((ws.title, ws) for ws in writer.book.worksheets)
    df_new.to_excel(writer, sheet_name='Sheet1', startrow=df_existing.shape[0]+1, header=False, index=False)