What is best way to learn Python for advanced developer?

[MRAB]

On 2014-07-30 21:20, guirec.corbel at gmail.com wrote:
> Hello,
>
> I am a Ruby developer and I want to program in Python. I know how to
> do simple things like create classes, methods, variables and all the
> basics. I want to know more. I want to know what is the Python
> philosophy, how to test, how to create maintenable software, etc.
>
If you want to know the philosophy, type:

     import this

at the Python prompt.

It'll give you "The Zen of Python".

> I'm looking for online courses and any ressources I can have on the
> subject.
>