How to find the position of an element in a list , in Python?

Question

for s in stocks_list:
    print s

how do I know what "position" s is in? So that I can do stocks_list[4] in the future?

http://stackoverflow.com/questions/364621/python-get-position-in-list — chronos, Mar 02 '11 at 17:41

score 90 · Answer 1 · answered Sep 23 '11 at 17:19

90

If you know what you're looking for ahead of time you can use the index method:

>>> stocks_list = ['AAPL', 'MSFT', 'GOOG']
>>> stocks_list.index('MSFT')
1
>>> stocks_list.index('GOOG')
2

answered Sep 23 '11 at 17:19

Ben Dowling

score 28 · Accepted Answer · answered Nov 19 '09 at 10:55

28

for index, s in enumerate(stocks_list):
    print index, s

answered Nov 19 '09 at 10:55

nosklo

I'm sorry. I accidentally downvoted. Could you please edit your answer so that I undo my downvote? – Artur Barseghyan Jun 15 '18 at 22:18
@ArturBarseghyan you could just upvote twice, to cancel the effect and establish an upvote. – ThunderBird Jul 09 '18 at 13:56
@YufenyuyVeyehDider: The message I get is "You last voted on this answer Jun 15 at 22:08. Your vote is now locked in unless this answer is edited." – Artur Barseghyan Jul 09 '18 at 19:40

score 3 · Answer 3 · answered Oct 04 '12 at 16:38

3

[x for x in range(len(stocks_list)) if stocks_list[x]=='MSFT']

answered Oct 04 '12 at 16:38

malekcellier

B Shmid · Answer 4 · 2021-11-03T10:23:32.260

0

The position is called by stocks_list.index(s), for example:

for s in stocks_list:
    print(stocks_list.index(s))

edited Nov 03 '21 at 10:23

answered Nov 02 '21 at 17:00

B Shmid

2

This is already stated by [the top-voted answer](https://stackoverflow.com/a/7532611/3025856). When answering questions with existing answers, be sure to review those answers, and only add a new answer if you have a different solution, or a substantially improved explanation. Later, when you have a bit more reputation, you'll also be able to upvote existing answers in order to validate their guidance. – Jeremy Caney Nov 03 '21 at 00:15
No it wasn't. That answer only said "If you know what you're looking for ahead of time" while mine does not necessitate that. – B Shmid Nov 03 '21 at 10:10

4 Answers4