Get a list (without nested list) directly from a list comprehension [duplicate]












6















This question already has an answer here:




  • Interleave multiple lists of the same length in Python

    7 answers




I want to return a list with the interleaved elements of two lists directly from the list comprehension - without use a next step to flaten the result. Is it possible?



alist1_temp=[1, 4,2]

alist2_temp=[3, 7,4]

t=[[x,y] for x,y in zip(alist1_temp, alist2_temp)]


Return [[1, 3], [4, 7],[2, 4]]



But how can I get directly from the list-comprehension [1, 3, 4, 7, 2, 4]?






python list list-comprehension







share|improve this question















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    6















    This question already has an answer here:




    • Interleave multiple lists of the same length in Python

      7 answers




    I want to return a list with the interleaved elements of two lists directly from the list comprehension - without use a next step to flaten the result. Is it possible?



    alist1_temp=[1, 4,2]
    
alist2_temp=[3, 7,4]
    
t=[[x,y] for x,y in zip(alist1_temp, alist2_temp)]


    Return [[1, 3], [4, 7],[2, 4]]



    But how can I get directly from the list-comprehension [1, 3, 4, 7, 2, 4]?






    python list list-comprehension







    share|improve this question















    marked as duplicate by shash678, ShadowRanger python
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    This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.


















      6












      6








      6








      This question already has an answer here:




      • Interleave multiple lists of the same length in Python

        7 answers




      I want to return a list with the interleaved elements of two lists directly from the list comprehension - without use a next step to flaten the result. Is it possible?



      alist1_temp=[1, 4,2]
      
alist2_temp=[3, 7,4]
      
t=[[x,y] for x,y in zip(alist1_temp, alist2_temp)]


      Return [[1, 3], [4, 7],[2, 4]]



      But how can I get directly from the list-comprehension [1, 3, 4, 7, 2, 4]?






      python list list-comprehension







      share|improve this question
















      This question already has an answer here:




      • Interleave multiple lists of the same length in Python

        7 answers




      I want to return a list with the interleaved elements of two lists directly from the list comprehension - without use a next step to flaten the result. Is it possible?



      alist1_temp=[1, 4,2]
      
alist2_temp=[3, 7,4]
      
t=[[x,y] for x,y in zip(alist1_temp, alist2_temp)]


      Return [[1, 3], [4, 7],[2, 4]]



      But how can I get directly from the list-comprehension [1, 3, 4, 7, 2, 4]?





      This question already has an answer here:




      • Interleave multiple lists of the same length in Python

        7 answers







      python list list-comprehension




      python list list-comprehension






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited yesterday









      jonrsharpe

      76.8k11102208




      76.8k11102208










      asked yesterday









      Pedro PintoPedro Pinto

      704




      704




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      marked as duplicate by shash678, ShadowRanger python
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          3 Answers
          3






          active

          oldest

          votes


















          5














          Try this with just zip to get it in that order that you want:



          [i for j in zip(alist1_temp, alist2_temp) for i in j]


          if you don't mind the order just do:



          alist1_temp + alist2_temp


          or get it with itertools.chain thanks to @buran:



          import itertools
          

          
list(itertools.chain(alist1_temp, alist2_temp))





          share|improve this answer























          • with the chain - why not just list(itertools.chain(alist1_temp, alist2_temp))? it's not comprehension, but I am not sure comprehension is strict requirement. And anyway the order of elements in the result is different.
            – buran
            yesterday












          • @buran Right, surely you are right
            – Mehrdad Pedramfar
            yesterday










          • @buran Edited, thanks for your comment
            – Mehrdad Pedramfar
            yesterday



















          1














          If you like numpy way of doing this, you could use this!



          np.vstack((alist1_temp,alist2_temp)).flatten('F')


          or you can flatten your list comprehension as well



          np.array(t).flatten()





          share|improve this answer





























            1














            As you specified that you want get it from from the list-comprehension:



            alist1_temp=[1,4,2]
            
alist2_temp=[3,7,4]
            
L = len(alist1_temp)+len(alist2_temp)
            
t = [alist2_temp[i//2] if i%2 else alist1_temp[i//2] for i in range(L)]
            
print(t) #prints [1, 3, 4, 7, 2, 4]





            share|improve this answer




























              3 Answers
              3






              active

              oldest

              votes








              3 Answers
              3






              active

              oldest

              votes









              active

              oldest

              votes






              active

              oldest

              votes









              5














              Try this with just zip to get it in that order that you want:



              [i for j in zip(alist1_temp, alist2_temp) for i in j]


              if you don't mind the order just do:



              alist1_temp + alist2_temp


              or get it with itertools.chain thanks to @buran:



              import itertools
              

              
list(itertools.chain(alist1_temp, alist2_temp))





              share|improve this answer























              • with the chain - why not just list(itertools.chain(alist1_temp, alist2_temp))? it's not comprehension, but I am not sure comprehension is strict requirement. And anyway the order of elements in the result is different.
                – buran
                yesterday












              • @buran Right, surely you are right
                – Mehrdad Pedramfar
                yesterday










              • @buran Edited, thanks for your comment
                – Mehrdad Pedramfar
                yesterday
















              5














              Try this with just zip to get it in that order that you want:



              [i for j in zip(alist1_temp, alist2_temp) for i in j]


              if you don't mind the order just do:



              alist1_temp + alist2_temp


              or get it with itertools.chain thanks to @buran:



              import itertools
              

              
list(itertools.chain(alist1_temp, alist2_temp))





              share|improve this answer























              • with the chain - why not just list(itertools.chain(alist1_temp, alist2_temp))? it's not comprehension, but I am not sure comprehension is strict requirement. And anyway the order of elements in the result is different.
                – buran
                yesterday












              • @buran Right, surely you are right
                – Mehrdad Pedramfar
                yesterday










              • @buran Edited, thanks for your comment
                – Mehrdad Pedramfar
                yesterday














              5












              5








              5






              Try this with just zip to get it in that order that you want:



              [i for j in zip(alist1_temp, alist2_temp) for i in j]


              if you don't mind the order just do:



              alist1_temp + alist2_temp


              or get it with itertools.chain thanks to @buran:



              import itertools
              

              
list(itertools.chain(alist1_temp, alist2_temp))





              share|improve this answer














              Try this with just zip to get it in that order that you want:



              [i for j in zip(alist1_temp, alist2_temp) for i in j]


              if you don't mind the order just do:



              alist1_temp + alist2_temp


              or get it with itertools.chain thanks to @buran:



              import itertools
              

              
list(itertools.chain(alist1_temp, alist2_temp))






              share|improve this answer














              share|improve this answer



              share|improve this answer








              edited yesterday

























              answered yesterday









              Mehrdad PedramfarMehrdad Pedramfar

              4,78211237




              4,78211237












              • with the chain - why not just list(itertools.chain(alist1_temp, alist2_temp))? it's not comprehension, but I am not sure comprehension is strict requirement. And anyway the order of elements in the result is different.
                – buran
                yesterday












              • @buran Right, surely you are right
                – Mehrdad Pedramfar
                yesterday










              • @buran Edited, thanks for your comment
                – Mehrdad Pedramfar
                yesterday


















              • with the chain - why not just list(itertools.chain(alist1_temp, alist2_temp))? it's not comprehension, but I am not sure comprehension is strict requirement. And anyway the order of elements in the result is different.
                – buran
                yesterday












              • @buran Right, surely you are right
                – Mehrdad Pedramfar
                yesterday










              • @buran Edited, thanks for your comment
                – Mehrdad Pedramfar
                yesterday
















              with the chain - why not just list(itertools.chain(alist1_temp, alist2_temp))? it's not comprehension, but I am not sure comprehension is strict requirement. And anyway the order of elements in the result is different.
              – buran
              yesterday






              with the chain - why not just list(itertools.chain(alist1_temp, alist2_temp))? it's not comprehension, but I am not sure comprehension is strict requirement. And anyway the order of elements in the result is different.
              – buran
              yesterday














              @buran Right, surely you are right
              – Mehrdad Pedramfar
              yesterday




              @buran Right, surely you are right
              – Mehrdad Pedramfar
              yesterday












              @buran Edited, thanks for your comment
              – Mehrdad Pedramfar
              yesterday




              @buran Edited, thanks for your comment
              – Mehrdad Pedramfar
              yesterday













              1














              If you like numpy way of doing this, you could use this!



              np.vstack((alist1_temp,alist2_temp)).flatten('F')


              or you can flatten your list comprehension as well



              np.array(t).flatten()





              share|improve this answer


























                1














                If you like numpy way of doing this, you could use this!



                np.vstack((alist1_temp,alist2_temp)).flatten('F')


                or you can flatten your list comprehension as well



                np.array(t).flatten()





                share|improve this answer
























                  1












                  1








                  1






                  If you like numpy way of doing this, you could use this!



                  np.vstack((alist1_temp,alist2_temp)).flatten('F')


                  or you can flatten your list comprehension as well



                  np.array(t).flatten()





                  share|improve this answer












                  If you like numpy way of doing this, you could use this!



                  np.vstack((alist1_temp,alist2_temp)).flatten('F')


                  or you can flatten your list comprehension as well



                  np.array(t).flatten()






                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered yesterday









                  AI_LearningAI_Learning

                  2,4691628




                  2,4691628























                      1














                      As you specified that you want get it from from the list-comprehension:



                      alist1_temp=[1,4,2]
                      
alist2_temp=[3,7,4]
                      
L = len(alist1_temp)+len(alist2_temp)
                      
t = [alist2_temp[i//2] if i%2 else alist1_temp[i//2] for i in range(L)]
                      
print(t) #prints [1, 3, 4, 7, 2, 4]





                      share|improve this answer


























                        1














                        As you specified that you want get it from from the list-comprehension:



                        alist1_temp=[1,4,2]
                        
alist2_temp=[3,7,4]
                        
L = len(alist1_temp)+len(alist2_temp)
                        
t = [alist2_temp[i//2] if i%2 else alist1_temp[i//2] for i in range(L)]
                        
print(t) #prints [1, 3, 4, 7, 2, 4]





                        share|improve this answer
























                          1












                          1








                          1






                          As you specified that you want get it from from the list-comprehension:



                          alist1_temp=[1,4,2]
                          
alist2_temp=[3,7,4]
                          
L = len(alist1_temp)+len(alist2_temp)
                          
t = [alist2_temp[i//2] if i%2 else alist1_temp[i//2] for i in range(L)]
                          
print(t) #prints [1, 3, 4, 7, 2, 4]





                          share|improve this answer












                          As you specified that you want get it from from the list-comprehension:



                          alist1_temp=[1,4,2]
                          
alist2_temp=[3,7,4]
                          
L = len(alist1_temp)+len(alist2_temp)
                          
t = [alist2_temp[i//2] if i%2 else alist1_temp[i//2] for i in range(L)]
                          
print(t) #prints [1, 3, 4, 7, 2, 4]






                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered yesterday









                          DaweoDaweo

                          1662




                          1662















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