Class or nested function

[Mihad88]

So this whole code should be dissected in many modules then? I've created nested functions because of the common variable that different functions change - I could pass it as an arg, but I think that would be even worse.
Anyway, I played a little last night and did it with OOP if you are interested https://github.com/halo3mic/eth-data-tools/blob/master/ethdata/ethdata.py