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+1 vote
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in Data Science by (17.6k points)

I use pandas to write to excel file in the following fashion:

import pandas

writer = pandas.ExcelWriter('Masterfile.xlsx') 

data_filtered.to_excel(writer, "Main", cols=['Diff1', 'Diff2'])

writer.save()

Masterfile.xlsx already consists of number of different tabs. However, it does not yet contain "Main".

Pandas correctly writes to "Main" sheet, unfortunately it also deletes all other tabs.

1 Answer

0 votes
by (41.4k points)

This will work fine:

import pandas

from openpyxl import load_workbook

book = load_workbook('Masterfile.xlsx')

writer = pandas.ExcelWriter('Masterfile.xlsx', engine='openpyxl') 

writer.book = book

writer.sheets = dict((ws.title, ws) for ws in book.worksheets)

data_filtered.to_excel(writer, "Main", cols=['Diff1', 'Diff2'])

writer.save()

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by (110 points)
Thank you for this solution! The line concerning the sheets attribute did the trick over other solutions present elsewhere.

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