Sending multiple .CSV files to .ZIP without storing to disk in Python

Question

I\'m working on a reporting application for my Django powered website. I want to run several reports and have each report generate a .csv file in memory that can be download

Answer 1

def zipFiles(files):
    outfile = StringIO() # io.BytesIO() for python 3
    with zipfile.ZipFile(outfile, 'w') as zf:
        for n, f in enumarate(files):
            zf.writestr("{}.csv".format(n), f.getvalue())
    return outfile.getvalue()

zipped_file = zip_files(myfiles)
response = HttpResponse(zipped_file, content_type='application/octet-stream')
response['Content-Disposition'] = 'attachment; filename=my_file.zip'

StringIO has getvalue method which return the entire contents. You can compress the zipfile by zipfile.ZipFile(outfile, 'w', zipfile.ZIP_DEFLATED). Default value of compression is ZIP_STORED which will create zip file without compressing.