python 小程序—循环和列表训练

a=input('please input your salary:')
purchase=[]
while True:
    products=[[1,'iphone',5800],[2,'book',50],[3,'bike',800],[4,'coffee',40]]
    for i in products:
        print i
    b=raw_input('please input the thing what you want buy(put Q or q to end):')
    if b.upper()=='Q':
        break
    elif products[int(b)-1][2]>a:
        print 'your money is not enough,choose other'
    else:
        a=a-products[int(b)-1][2]
        purchase.append(products[int(b)-1])

print 'the next is what you have bought:'
print 'your balance is %s'%a
for i in purchase:
    print i