Troubles With Downloading And Saving A Document In Django

I have a few problems, cannot figure it out, maybe there are connected. Problem 1.1: file is exported in django documentation and it works, but when I try to rename it, it has some

Solution 1:

output = io.BytesIO() You created here was not used at all.

try changing

with pd.ExcelWriter('output.xlsx') as writer:

to

writer = pd.ExcelWriter(output)

Otherwise the BytesIO might be closed by the ExcelWriter, then Django would try to close it again. Giving you the double close error.

Your problem 2 seems to be a type error.

filename = newdoc + '_calculated.xlsx'

your newdoc here is not a string, but a "InMemoryUploadedFile", you probably need to access its name by doing

filename = f"{newdoc.name}_calculated.xlsx"