Copy file from https://github.com/xharaken/step2015/blob/master/calculator_modularize_2.py
Copy file from https://github.com/xharaken/step2015/blob/master/calculator_modularize_2.py

hikalium/STEP2017,hikalium/STEP2017,hikalium/STEP2017,hikalium/STEP2017,hikalium/STEP2017,hikalium/STEP2017,hikalium/STEP2017,hikalium/STEP2017