build_features1.py

import json


routes = json.loads(open("routes.json").read())

country_to_country_code = json.loads(open("country_name_to_country_code.json").read())

country_code_to_feature = {}
for country in routes:
    if country in country_to_country_code:
        code = country_to_country_code[country]
        to_amount = sum(routes[country]["to"].values())
        from_amount = sum(routes[country]["from"].values())
        country_code_to_feature[code] = [to_amount, from_amount]

print country_code_to_feature