Diff for "ObpLovelyPython/PCS205" - Woodpecker Wiki for CPUG

Differences between revisions 1 and 2

status

草稿

清风; 100%

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"

-  ⇤ ← Revision 1 as of 2008-04-25 06:50:36 → 
  Size: 494
  Editor: qingfeng
  Comment:
+   ← Revision 2 as of 2008-06-17 12:59:10 → ⇥
  Size: 585
  Editor: qingfeng
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 9:
+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
}}}
-Line 10:
+Line 17:
-由于Python没有像
{{{
for(int i=0;i<10;i++)
}}}
这样的循环方式,所以我们要拿到循环的索引就需要用到enumerate:
+行者:..........请尝试enumerate
-Line 29:
+Line 31: