r = requests.get(url, stream =True)
check = zipfile.is_zipfile(io.BytesIO(r.content))
while not check:
    r = requests.get(url, stream =True)
    check = zipfile.is_zipfile(io.BytesIO(r.content))
else:
    z = zipfile.ZipFile(io.BytesIO(r.content))
    z.extractall()