shoplist = ['apple', 'mango', 'carrot', 'banana'] #定义一个列表
print 'I have', len(shoplist),'items to purchase' #计算列表长度
print 'These items are:', #遍历列表
for item in shoplist:
print item,
print '\nI also to buy rice'
shoplist.append('rice') #列表当中添加item
print 'My shopping list is now',shoplist
print 'I will sort my list now'
shoplist.sort() #列表进行排序
print 'Sorted shopping list is ',shoplist
print 'The first item I will buy is',shoplist[0] #访问单个列表元素
olditem = shoplist[0]
del shoplist[0] #删除列表元素
print 'I bought the',olditem
print 'My shopping list is now',shoplist
