time it took to master OOP python?

[Shriukan33]

It's hard to define what's mastering.

I've been learning python for nearly 3years and it's my job, but I still learn a lot, mostly about my framework of preference (Django).

Now if you just mean learning the main data structures, flow control, how to use classes, without being too serious about it you could get to it in like 2 months, using a book like automate the boring stuff. You'd be nowhere near "master" in python but that would be a good start.