find position of item in for loop over a sequence

Question

Possible Duplicate:
Accessing the index in Python for loops

list = [1,2,2,3,5,5,6,7]

for item in mylist:
    ...

How can I find the index of the item I am looking at, at some point in my loop? I can see there is a index() method for lists but it will always give me the first index of a value, so it won't work for lists with duplicate items

Duplicate; check if someone else asked it already before you ask it. Google is a friend of mine (google is my friend!) — machine yearning, Jun 19 '11 at 18:57

score 16 · Accepted Answer · answered Jun 19 '11 at 17:57

16

Have a look at enumerate

>>> for i, season in enumerate('Spring Summer Fall Winter'.split(), start=1):
        print i, season
1 Spring
2 Summer
3 Fall
4 Winter

answered Jun 19 '11 at 17:57

Fredrik Pihl

44,604
7
83
130

score 6 · Answer 2 · answered Jun 19 '11 at 17:56

6

Use an enumerator object:

for index, item in enumerate(mylist):
  ...

answered Jun 19 '11 at 17:56

bluepnume

16,460
8
38
48

find position of item in for loop over a sequence

2 Answers2

Linked