[karangoeluw]

> At first, it uses only old-style classes because it doesn't inherits object explicitly.

Please explain this further.

> usage of Python-3-style syntax, which is also valid in Python 2.7

Will do this

[mapleoin]

See http://docs.python.org/2/reference/datamodel.html#new-style-... for the distinction

[karangoeluw]

Alright. Fixed.