Python: How to get all combination?












0












$begingroup$


Please tell me how to get the following combination in python.



I have a list:



L = list(range(N))



Say N=10, it will be:



L = [0,1,2,3,4,5,6,7,8,9]



From the list, I want a new list picking two elements up and making five pairs(use all elements but each element only once in the list).
It would be like:



M = [[0,1],[2,3],[4,5],[6,7],[8,9]]
or can be:
M = [[0,2],[1,3],[4,5],[6,7],[8,9]]



I guess there are 9*7*5*3*1=495 combinations, but how to get all those combinations(not as permutations)?



Thanks.









share







New contributor




mne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$

















    0












    $begingroup$


    Please tell me how to get the following combination in python.



    I have a list:



    L = list(range(N))



    Say N=10, it will be:



    L = [0,1,2,3,4,5,6,7,8,9]



    From the list, I want a new list picking two elements up and making five pairs(use all elements but each element only once in the list).
    It would be like:



    M = [[0,1],[2,3],[4,5],[6,7],[8,9]]
    or can be:
    M = [[0,2],[1,3],[4,5],[6,7],[8,9]]



    I guess there are 9*7*5*3*1=495 combinations, but how to get all those combinations(not as permutations)?



    Thanks.









    share







    New contributor




    mne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







    $endgroup$















      0












      0








      0





      $begingroup$


      Please tell me how to get the following combination in python.



      I have a list:



      L = list(range(N))



      Say N=10, it will be:



      L = [0,1,2,3,4,5,6,7,8,9]



      From the list, I want a new list picking two elements up and making five pairs(use all elements but each element only once in the list).
      It would be like:



      M = [[0,1],[2,3],[4,5],[6,7],[8,9]]
      or can be:
      M = [[0,2],[1,3],[4,5],[6,7],[8,9]]



      I guess there are 9*7*5*3*1=495 combinations, but how to get all those combinations(not as permutations)?



      Thanks.









      share







      New contributor




      mne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.







      $endgroup$




      Please tell me how to get the following combination in python.



      I have a list:



      L = list(range(N))



      Say N=10, it will be:



      L = [0,1,2,3,4,5,6,7,8,9]



      From the list, I want a new list picking two elements up and making five pairs(use all elements but each element only once in the list).
      It would be like:



      M = [[0,1],[2,3],[4,5],[6,7],[8,9]]
      or can be:
      M = [[0,2],[1,3],[4,5],[6,7],[8,9]]



      I guess there are 9*7*5*3*1=495 combinations, but how to get all those combinations(not as permutations)?



      Thanks.







      python





      share







      New contributor




      mne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.










      share







      New contributor




      mne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.








      share



      share






      New contributor




      mne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 2 mins ago









      mnemne

      1




      1




      New contributor




      mne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      mne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      mne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






















          0






          active

          oldest

          votes











          Your Answer





          StackExchange.ifUsing("editor", function () {
          return StackExchange.using("mathjaxEditing", function () {
          StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
          StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
          });
          });
          }, "mathjax-editing");

          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "557"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: false,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });






          mne is a new contributor. Be nice, and check out our Code of Conduct.










          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fdatascience.stackexchange.com%2fquestions%2f45360%2fpython-how-to-get-all-combination%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          0






          active

          oldest

          votes








          0






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          mne is a new contributor. Be nice, and check out our Code of Conduct.










          draft saved

          draft discarded


















          mne is a new contributor. Be nice, and check out our Code of Conduct.













          mne is a new contributor. Be nice, and check out our Code of Conduct.












          mne is a new contributor. Be nice, and check out our Code of Conduct.
















          Thanks for contributing an answer to Data Science Stack Exchange!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          Use MathJax to format equations. MathJax reference.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fdatascience.stackexchange.com%2fquestions%2f45360%2fpython-how-to-get-all-combination%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          Popular posts from this blog

          Ponta tanko

          Tantalo (mitologio)

          Erzsébet Schaár