multiple openpyxl xlsx workbooks into one .zip file for download - django

Question

I am trying to get some xlsx files from a form, i load them using openpyxl and do some data processing.. and finally i need to download all processed xlsx files zipped to the user.
here is an example of what i did so far
if form.is_valid():
s = StringIO.StringIO()
zf = zipfile.ZipFile(s, mode="w")
for xlsx in request.FILES.getlist('xlsxs'):
element_column = "G"
element_row = 16
massar_column = "C"
massar_row_start = 18
loop = column_index_from_string(element_column)
while (loop <= ws.max_column):
for i in range(massar_row_start, ws.max_row+1):
# ...
ws["%s%s" % (element_column,i)] = 0
# ...
loop+=2
element_column = get_column_letter(loop)
buf = save_virtual_workbook(wb)
zf.write(buf) # or zf.write(wb)
zf.close()
response = HttpResponse(s.getvalue(), content_type="application/x-zip-compressed")
response['Content-Disposition'] = "attachment; filename=notes.zip"
return response
I get the error
TypeError at My_view
stat() argument 1 must be encoded string without null bytes, not str
Thanks in advance for any help you can offer.

Answer 1

save_virtual_workbook returns a bytestream - source.
You are passing this value to ZipFile.write which is expecting a filename.
I think you should be using ZipFile.writestr, and you need to provide a filename that will be used inside the archive. I'm not sure how you are getting the error message you see, but this is the first mistake I can see.