how to combine same matching items in a 1d list and make it as 2d list

Asked Dec 15 '20 at 19:55

Active Dec 15 '20 at 20:17

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Combine same items in a 1d list and make it as 2d list. I can do this using for loops and if condition. But i want to know if there is any pythonic way to do this.

Input List:

 lis = ['computer', 'science', 'math', 'science', 'biology', 'math', 'computer', 'math']

output should be:

[['computer', ' computer'], ['science', 'science'], ['math', 'math', 'math'], ['biology'] ]

edited Dec 15 '20 at 20:17

asked Dec 15 '20 at 19:55

badhusha muhammed

Does this answer your question? [How can I compare two lists in python and return matches](https://stackoverflow.com/questions/1388818/how-can-i-compare-two-lists-in-python-and-return-matches) – Daweed Dec 15 '20 at 20:00
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@Daweed that is not at all related... There are no two input lists in this question – Tomerikoo Dec 15 '20 at 20:01
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@Daweed. How are the two related? Perhaps I'm missing something? – Mad Physicist Dec 15 '20 at 20:02
When you say "I can write a for loop", actually write the loop next time. – Mad Physicist Dec 15 '20 at 20:02
@badhusha, Try this [[x] * lis.count(x) for x in set(lis)] – modnar Dec 15 '20 at 20:08
Guys i just want to combine the same items in a list, i think my input list and sample output explained it clearly. – badhusha muhammed Dec 15 '20 at 20:19
@modnar that's highly inefficient... – Tomerikoo Dec 15 '20 at 20:19
@badhushamuhammed your question is clear. It already has been answered in the link at the top of the page – Tomerikoo Dec 15 '20 at 20:20
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yah i got it, im just asking is there any pythonic way to do this, rater than using loop and if – badhusha muhammed Dec 15 '20 at 20:23

how to combine same matching items in a 1d list and make it as 2d list

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