List occurrences in list of lists

Question

We have a list containing lists like so:

My_list = [ [1,2,3],[4,5,6],[7,8,9],[1,2,3] ]

Is there an easy way to learn that the list item [1,2,3] appears twice in My_list? I am not interested in the individual numbers but i am interested in them as a list.

Possible duplicate of [How can I count the occurrences of a list item in Python?](http://stackoverflow.com/questions/2600191/how-can-i-count-the-occurrences-of-a-list-item-in-python) — beeftendon, Nov 02 '16 at 21:32

Moinuddin Quadri · Accepted Answer · 2016-11-02T21:04:16.677

1

You may use list.count() in order to find the occurrence of item in the list as:

>>> My_list.count([1, 2, 3])
2

edited Nov 02 '16 at 21:04

answered Nov 02 '16 at 21:02

Moinuddin Quadri

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I have tried it like so: 'for x in My_list print(MyList.count(x))' Not working – Thanos Mygdalias Nov 02 '16 at 21:04
@ThanosMygdalias presumably because that isn't syntactically valid Python. I'd recommend a tutorial. – jonrsharpe Nov 02 '16 at 21:06
Did you had `:` after the My_list as `for x in My_list: print My_list.count(x)`? It will work – Moinuddin Quadri Nov 02 '16 at 21:06
@down-voter: Please also mention the reason, so that I could correct my mistake or improve my answer if it lacks something :) – Moinuddin Quadri Nov 02 '16 at 21:08
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Well actually it was far worse -_- I have another list with a similar name and autocomplete did its job :p Was looking at the wrong list. *embarrassed* Yeah it works, thanks – Thanos Mygdalias Nov 02 '16 at 21:09

List occurrences in list of lists

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