组织类属性，构造函数参数和子类构造函数默认的大多数“pythonic”方式？

Being relatively new to Python 2, I'm uncertain how best to organise my class files in the most 'pythonic' way. I wouldn't be asking this but for the fact that Python seems to have quite a few ways of doing things that are very different to what I have come to expect from the languages I am used to.Being relatively new to Python 2, I'm uncertain