PEP8 cosmetic changes#3

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emilcan-arican wants to merge 36 commits intoiotbc-boun:masterfrom

emilcan-arican:master

Commits on Sep 26, 2019

PEP8 cosmetic changes
emilcan-arican
committed

Commits on Oct 15, 2019

Update blockchain.py
emilcan-arican
authored

Commits on Feb 22, 2020

Commits on Mar 4, 2020

Commits on Mar 9, 2020

Commits on Mar 11, 2020