import time
from cryptocmpy import CryptoCmpy

# amount of seconds calculation for 1 day
day2seconds = 3600 * 24
# current unix datetime format in seconds
epoch = int(time.time())

# from 3 days ago to now as unix epoch
since = epoch - (day2seconds * 3)

cmp = CryptoCmpy()

historic_price = cmp.get_historical_price('BTC', since, 'EUR', 'USD')

print(historic_price)