通过 Python 更新现有的 excel 文件

Question

我多次尝试运行这个程序，但现有的 excel 文件没有得到更新。有人可以指导我完成正确的过程吗？感谢您的帮助！

import pandas as pd
import openpyxl as pl
manifest_df = pd.read_excel(r'C:\Users\dhruvjadhav\PycharmProjects\Alpha\PassengerManifest.xlsx')
manifest_df['Current Balance'] = manifest_df['Balance'] - manifest_df['Fare']
print(manifest_df)
filename = (r'C:\Users\dhruvjadhav\PycharmProjects\Alpha\PassengerManifest.xlsx')
wb = pl.load_workbook(filename)
ws = wb.worksheets[0]
for ws in wb.worksheets:
    print(ws.title)
with pd.ExcelWriter("PassengerManifest.xlsx", engine="openpyxl", mode="a") as writer:
    manifest_df.to_excel(writer, sheet_name="ws.title")
writer.save()

Answer 1

如果要更新现有的excel，可以使用以下代码。只需要熊猫。

import pandas as pd

# read the xlsx file
manifest_df = pd.read_excel(r'C:\Users\dhruvjadhav\PycharmProjects\Alpha\PassengerManifest.xlsx')
# perform arithmentic operation
manifest_df['Current Balance'] = manifest_df['Balance'] - manifest_df['Fare']
# write again the excel file
manifest_df.to_excel(r'C:\Users\dhruvjadhav\PycharmProjects\Alpha\PassengerManifest.xlsx', index=False)

就是这样