it still does not work...
I get a 404 error when accessing e4a_install.py on my desktop. My phone is able to download it through the QR code, but the Python script tries to download the the file
http://ecdsa.org/electrum/e4a/e4a-0.52.zip which also doesn't exist.
actually, the original script downloaded
http://ecdsa.org/electrum/e4a (which was a full path, e4a was the filename) and saved it as e4a-0.52.zip
I did this because something (my mobile network operator?) prevented me from downloading a file with .zip extension from a telephone