数据结构

shoplist = [‘apple‘,‘mango‘,‘carrot‘,‘banana‘]

print (‘i have‘,len(shoplist),‘items to purchase‘)

print (‘these items are:‘)
for item in shoplist:
    print(item),

print(‘\ni also have to buy rice.‘)
shoplist.append(‘rice‘)
print(‘my shopping list is now‘,shoplist)
print(‘i will sort my list now‘)
shoplist.sort()
print(‘sorted shopping list is‘,shoplist)
print(‘the first item i will buy is‘,shoplist[0])
olditem = shoplist[0]
del shoplist[0]
print(‘i bougth the‘,olditem)
print (‘my shopping list is now‘,shoplist)