>>> season = [‘spring‘,‘summer‘,‘autumn‘,‘winter‘]
          
>>> list(enumerate(season))
          
[(0, ‘spring‘), (1, ‘summer‘), (2, ‘autumn‘), (3, ‘winter‘)]

>>> i = 0
          
>>> seq = [‘one‘,‘two‘,‘three‘]
          >>> for enumerate in seq:
          print( i ,seq[i])
          i += 1

          
0 one
1 two
2 three

1 season = [‘spring‘,‘summer‘,‘autumn‘,‘winter‘]
2 a= list(enumerate(season))
3 for i in a:
4     print(i)

1 li = ["手机", "电脑", ‘鼠标垫‘, ‘游艇‘]
2 while True:
3 
4     choice =int(input("请输入你需要的商品号："))
5     for key,val in enumerate (li,1):
6         print(key,val)
7     print(li[choice-1])