Python - Leer archivo .csv

#!/usr/bin/env python

# -*- coding: utf-8 -*-

f = open("datos.csv", "rb")

for dato in f.readlines():

    print (dato)

    d = dato.split(",")

    print (d)

f.close()

f = open("datos.csv", "r")

import csv

#---------- Escritura --------------------

datos= [['Tornillo','M6',20,0.2,30],

		['Tuerca','M8',10,0.12,20]]

def escritura_csv():

	with open('albaran.csv','w',newline='') as f:

	    w = csv.writer(f,quoting=csv.QUOTE_NONNUMERIC)

	    w.writerow(['Descripción','Métrica','Cantidad','Precio unidad','Subtotal','Total'])

	    w.writerows(datos)

escritura_csv()

#--------- Lectura -----------------------

def lectura():

	with open('albaran.csv', newline='') as f:

		leer = csv.reader(f)

		for row in leer:

			print('{:^14}{:^14}{:^14}{:^14}{:^14}'.format(row[0],row[1],row[2],row[3],row[4]))

lectura()