Finding an index in Python

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How do I find the index of an item from a list?

For example, I have a list - ["ace, "tot", "pen"] and I need to find the index of pen from the list which should be (2)
Nov 19, 2018 in Python by ana1504.k
• 7,870 points
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1 answer to this question.

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You can find the index in the following way-

>>> ["ace", "tot", "pen"].index("pen")
2

Note that while this is perhaps the cleanest way to answer the question as asked, index is a rather weak component of the list API, and I can't remember the last time I used it in anger. It's been pointed out to me in the comments that because this answer is heavily referenced, it should be made more complete.
answered Nov 19, 2018 by SDeb
• 13,160 points

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