list-购物程序import sys
salary=int(raw_input('Please input your salary:'))
products=[['Iphone',5800],['MacPro',12000],['NB Shoes',680],['Cigrate',48],['MX4',2500]]
#create a shopping list
shopping_list=[]
while True:
for p in products:
print products.index(p), p[0],p[1]
choice = raw_input("\033[32;1mPlease choose sth to buy:\033[0m").strip()
if choice == 'quit':
print "You have bought below stuff:"
for i in shopping_list:
print '\t',i
sys.exit('Goodbye!')
if len(choice) == 0:continue
if not choice.isdigit():continue
choice = int(choice)
if choice >= len(products): #out of range
print '\033[31;1mCould not find this item\033[0m'
continue
pro = products[choice]
if salary >= pro[1]: #means you can afford this
salary=salary - pro[1]
shopping_list.append(pro)
print "\033[34;1mAdding %s to shopping list,you have %s left\033[0m" %(pro[0],salary)
else:
print 'The price of %s is %s,yet your current balance is %s,so try another one!'%(pro[0],pro[1],salary)
