missing Arabic GSM converter encoding

  character-encoding, encoding, python

I am trying -but in vain- to have a normal txt file written in Arabic but encoded with GSM 03.38 or any GSM 7-bit encoding that support Arabic Letters to use it with USSD service.

note1: GSM 7 does not support Arabic letters.
note2: piece of code or regular GUI is OK for me.

Source: Python Questions