finding index of multiple items in a list

Question

I have a list

myList = ["what is your name", "Hi, how are you", "What about you", "How about a coffee", "How are you"]

Now I want to search index of all occurrence of "How" and "what". How can I do this in Pythonic way?

What if How or what appears more than once in a string? And what about case sensitivity? — thefourtheye
– thefourtheye, Commented Jun 9, 2015 at 10:44

TerryA · Accepted Answer · 2015-06-09 21:48:21Z

5

Sounds like a one-liner Python is able to do!

[i for i, j in enumerate(myList) if 'how' in j.lower() or 'what' in j.lower()]

edited Jun 9, 2015 at 21:48

answered Jun 9, 2015 at 10:44

TerryA

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2 Comments

lord63. j Over a year ago

Has anyone really tried this one? It should be j.lower(), i is the index, right?

TerryA Over a year ago

@lord63.j Yup, my bad. Forgot to change it when I first changed [j for ... to [i for ...

Mathias711 · Accepted Answer · 2015-06-09 10:46:36Z

1

This will work, but assumes you do not care about case sensitivity:

myList = ["what is your name","Hi, how are you","What about you","How about a coffee","How are you"] duplicate = "how are you" index_list_of_duplicate = [i for i,j in enumerate(myList) if duplicate in j.lower()] print index_list_of_duplicate [1,4]