from the desk of stinkpot

get all possible combinations of a list’s elements in python

April 16th, 2008 by Lawrence David

let’s say you’ve got a list of the numbers 0 through 4 and you wanted all 32 possible combinations of them.  to get that list:

list_of_five = range(0,5)   

swap_list_list = [[]]

for swap in list_of_five:

    temp_lists = []

    for list_stub in swap_list_list:

        this_list = copy.copy(list_stub)

        this_list.append(swap)

        temp_lists.append(this_list)

temp_lists.append(list_stub)

    swap_list_list = temp_lists

print swap_list_list

 

 

Posted in Python | 5 Comments »

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5 Responses to “get all possible combinations of a list’s elements in python”

1. on 21 Dec 2008 at 12:31 am   shady

   After doing “import copy” to your code, I get this output.

   $ python combo.py
   [[4], []]

2. on 29 Oct 2013 at 7:41 pm   Python code to pick out all possible combinations from a list? | Ask & Answers

   […] found some code (by googling) that apparently does what I’m looking for, but I found the code fairly opaque […]

3. on 17 Mar 2015 at 3:00 am   P.K. Subramanian

   Yes. You got this wrong.

   When you don’t have import copy module this is completely useless.

4. on 23 Dec 2015 at 6:30 pm   Python code to pick out all possible combinations from a list? | ASK AND ANSWER

   […] found some code (by googling) that apparently does what I’m looking for, but I found the code fairly opaque […]

5. on 17 Sep 2021 at 1:09 pm   목록 요소의 가능한 모든 조합을 얻는 방법은 무엇입니까? 것을 분명히하는 (구글링에 의해)를 찾았지만 코드가 - How IT

   […] 코드를 찾았 습니다 찾고있는 것을 분명히하는 (구글링에 의해)를 찾았지만 코드가 상당히 불투명하고 사용하는 것에주의를 기울였습니다. 또한 더 ìš°ì•„í•œ 솔루션이 있어야한다고 생각합니다. […]