Save DataFrame to next row in existing excel sheet

Question

Ideally I'm building a self-updating mechanism. The last thing I need to do is save content from "dff" to the next empty row in an existing excel sheet "test.xlsx".

book = load_workbook("test.xlsx")
writer = pd.ExcelWriter('test.xlsx', engine='openpyxl') 
writer.book = book
writer.sheets = dict((ws.title, ws) for ws in book.worksheets)
dff.to_excel(writer, startrow=len(dff), header=None)
writer.save()

The issue is around the 2nd last row, the "startrow=" part. So far I can make it enter the dataframe content to row 3, but it overwrites the contents.

Say I have content 08/09-2019 00, 00, 00, 00 How would I add it to the next empty row of my excel sheet?

Answer 1

尝试这个

dff.to_excel(writer, startrow=len(dff)+1, header=False, index=False)