Traceback (most recent call last):

  File "/home/openstag/www/www/test-upload.py", line 41, in <module>
    main()
  File "/home/openstag/www/www/test-upload.py", line 15, in main
    resobject = form["res"]
  File "/usr/lib/python3.9/cgi.py", line 525, in __getitem__
    raise KeyError(key)
KeyError: 'res'