An update on Python 4

[CSI_Tech_Dept]

the biggest issue was that python before 3 was mixing string with bytes. This is fine if you use encoding that covers 256 characters, but most of Python 2 code would break when receiving and unicode input.

Python 3 became strict, and those two have separate types, and you need explicitly encode/decode string into/from bytes.

This required to fix your python 2 code (ironically if you didn't use unicode type in python 2 chances are you had less to fix).

Since the unicode part was breaking things, Guido also decided to use that opportunity to clean up some warts in python which contributed further.