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enumerate

小白:Python中的循环,想知道现在循环了几次好麻烦,总要在循环外定义一个变量,然后每次循环再加1,像这样: 

i=0
for obj in objlist:
    i+=1
    print i

行者:..........请尝试enumerate 

   1 mylist=["a","b","c"]
   2 for index,obj in enumerate(mylist):
   3     print index,obj


0,"a"
1,"b"
2,"c"

练习

-- 清风 DateTime(2008-04-25T14:33:00Z)