how to write back the sorted lines of a file in alphanumerical order










0















def sortall(string):
if not string:
return
return (sortall([x for x in string[1:] if x < string[0]])
+ [string[0]] +
sortall([x for x in string[1:] if x >= string[0]]))


file = open("sorting.txt", "r+")
for line in file.readline():
xd = (''.join(sortall(line)))
file2 = open("sorting.txt", "w")
file2.write(xd)


how do i make it my code print the sorted file lines, but when it does, it does it in ascending order.










share|improve this question






















  • What is the problem? Do you want it in descending order instead?

    – Michael Butscher
    Nov 15 '18 at 2:49















0















def sortall(string):
if not string:
return
return (sortall([x for x in string[1:] if x < string[0]])
+ [string[0]] +
sortall([x for x in string[1:] if x >= string[0]]))


file = open("sorting.txt", "r+")
for line in file.readline():
xd = (''.join(sortall(line)))
file2 = open("sorting.txt", "w")
file2.write(xd)


how do i make it my code print the sorted file lines, but when it does, it does it in ascending order.










share|improve this question






















  • What is the problem? Do you want it in descending order instead?

    – Michael Butscher
    Nov 15 '18 at 2:49













0












0








0








def sortall(string):
if not string:
return
return (sortall([x for x in string[1:] if x < string[0]])
+ [string[0]] +
sortall([x for x in string[1:] if x >= string[0]]))


file = open("sorting.txt", "r+")
for line in file.readline():
xd = (''.join(sortall(line)))
file2 = open("sorting.txt", "w")
file2.write(xd)


how do i make it my code print the sorted file lines, but when it does, it does it in ascending order.










share|improve this question














def sortall(string):
if not string:
return
return (sortall([x for x in string[1:] if x < string[0]])
+ [string[0]] +
sortall([x for x in string[1:] if x >= string[0]]))


file = open("sorting.txt", "r+")
for line in file.readline():
xd = (''.join(sortall(line)))
file2 = open("sorting.txt", "w")
file2.write(xd)


how do i make it my code print the sorted file lines, but when it does, it does it in ascending order.







python






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 15 '18 at 2:38









Casey HowardCasey Howard

52




52












  • What is the problem? Do you want it in descending order instead?

    – Michael Butscher
    Nov 15 '18 at 2:49

















  • What is the problem? Do you want it in descending order instead?

    – Michael Butscher
    Nov 15 '18 at 2:49
















What is the problem? Do you want it in descending order instead?

– Michael Butscher
Nov 15 '18 at 2:49





What is the problem? Do you want it in descending order instead?

– Michael Butscher
Nov 15 '18 at 2:49












2 Answers
2






active

oldest

votes


















0














read whole file, sort and write into new file:



with open('file1', 'r') as f:
lst = f.readlines()
with open('file2', 'w') as w:
w.writelines(sorted(lst))


if "sorted" should use some special sorting, provide comparing function in "key" argument:



print(help(sorted))



sorted(iterable, /, *, key=None, reverse=False)

Return a new list containing all items from the iterable in ascending order.



A custom key function can be supplied to customize the sort order, and the
reverse flag can be set to request the result in descending order.







share|improve this answer






























    0














    This is a more concise way to do it:



    with open('sorting.txt', 'r+') as f:
    sorted_lines = sorted(f.readlines())
    f.writelines(sorted_lines)


    As you can see here: https://docs.python.org/3/howto/sorting.html, you can provide a callable in order to customize the ordering.




    sorted(iterable, /, *, key=None, reverse=False)

    Return a new list containing all items from the iterable in ascending order.



    A custom key function can be supplied to customize the sort order, and the
    reverse flag can be set to request the result in descending order.







    share|improve this answer






















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      2 Answers
      2






      active

      oldest

      votes








      2 Answers
      2






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      0














      read whole file, sort and write into new file:



      with open('file1', 'r') as f:
      lst = f.readlines()
      with open('file2', 'w') as w:
      w.writelines(sorted(lst))


      if "sorted" should use some special sorting, provide comparing function in "key" argument:



      print(help(sorted))



      sorted(iterable, /, *, key=None, reverse=False)

      Return a new list containing all items from the iterable in ascending order.



      A custom key function can be supplied to customize the sort order, and the
      reverse flag can be set to request the result in descending order.







      share|improve this answer



























        0














        read whole file, sort and write into new file:



        with open('file1', 'r') as f:
        lst = f.readlines()
        with open('file2', 'w') as w:
        w.writelines(sorted(lst))


        if "sorted" should use some special sorting, provide comparing function in "key" argument:



        print(help(sorted))



        sorted(iterable, /, *, key=None, reverse=False)

        Return a new list containing all items from the iterable in ascending order.



        A custom key function can be supplied to customize the sort order, and the
        reverse flag can be set to request the result in descending order.







        share|improve this answer

























          0












          0








          0







          read whole file, sort and write into new file:



          with open('file1', 'r') as f:
          lst = f.readlines()
          with open('file2', 'w') as w:
          w.writelines(sorted(lst))


          if "sorted" should use some special sorting, provide comparing function in "key" argument:



          print(help(sorted))



          sorted(iterable, /, *, key=None, reverse=False)

          Return a new list containing all items from the iterable in ascending order.



          A custom key function can be supplied to customize the sort order, and the
          reverse flag can be set to request the result in descending order.







          share|improve this answer













          read whole file, sort and write into new file:



          with open('file1', 'r') as f:
          lst = f.readlines()
          with open('file2', 'w') as w:
          w.writelines(sorted(lst))


          if "sorted" should use some special sorting, provide comparing function in "key" argument:



          print(help(sorted))



          sorted(iterable, /, *, key=None, reverse=False)

          Return a new list containing all items from the iterable in ascending order.



          A custom key function can be supplied to customize the sort order, and the
          reverse flag can be set to request the result in descending order.








          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 15 '18 at 3:05









          vavvav

          3,42911130




          3,42911130























              0














              This is a more concise way to do it:



              with open('sorting.txt', 'r+') as f:
              sorted_lines = sorted(f.readlines())
              f.writelines(sorted_lines)


              As you can see here: https://docs.python.org/3/howto/sorting.html, you can provide a callable in order to customize the ordering.




              sorted(iterable, /, *, key=None, reverse=False)

              Return a new list containing all items from the iterable in ascending order.



              A custom key function can be supplied to customize the sort order, and the
              reverse flag can be set to request the result in descending order.







              share|improve this answer



























                0














                This is a more concise way to do it:



                with open('sorting.txt', 'r+') as f:
                sorted_lines = sorted(f.readlines())
                f.writelines(sorted_lines)


                As you can see here: https://docs.python.org/3/howto/sorting.html, you can provide a callable in order to customize the ordering.




                sorted(iterable, /, *, key=None, reverse=False)

                Return a new list containing all items from the iterable in ascending order.



                A custom key function can be supplied to customize the sort order, and the
                reverse flag can be set to request the result in descending order.







                share|improve this answer

























                  0












                  0








                  0







                  This is a more concise way to do it:



                  with open('sorting.txt', 'r+') as f:
                  sorted_lines = sorted(f.readlines())
                  f.writelines(sorted_lines)


                  As you can see here: https://docs.python.org/3/howto/sorting.html, you can provide a callable in order to customize the ordering.




                  sorted(iterable, /, *, key=None, reverse=False)

                  Return a new list containing all items from the iterable in ascending order.



                  A custom key function can be supplied to customize the sort order, and the
                  reverse flag can be set to request the result in descending order.







                  share|improve this answer













                  This is a more concise way to do it:



                  with open('sorting.txt', 'r+') as f:
                  sorted_lines = sorted(f.readlines())
                  f.writelines(sorted_lines)


                  As you can see here: https://docs.python.org/3/howto/sorting.html, you can provide a callable in order to customize the ordering.




                  sorted(iterable, /, *, key=None, reverse=False)

                  Return a new list containing all items from the iterable in ascending order.



                  A custom key function can be supplied to customize the sort order, and the
                  reverse flag can be set to request the result in descending order.








                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Nov 15 '18 at 4:16









                  Juan Ignacio SánchezJuan Ignacio Sánchez

                  331112




                  331112



























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