I want to be proficient in Python to do a few scripting projects I have had in mind and also to complete a few raspberry pi projects I have been wanting to do for a while. I can also see some applications at my day job in sales.

I've been through codeacademy, some coursera courses and recently Learn Python the Hard Way, this is sadly over a period of years not months so I'm still slowly acquiring a full understanding. Any advice on what to read / watch next is apprecaited.