import numpy as np
km = pn.loadtxt('carros-km.txt')
kmyear = np.loadtxt('carros_anos.txt')
yearave_km = km/(2019-year)
ave_kmimport numpy as np
km = pn.loadtxt('carros-km.txt')
kmyear = np.loadtxt('carros_anos.txt')
yearave_km = km/(2019-year)
ave_km