Python sub folder modules not able to import other subfolder modules












1















I have been struggling to figure out how to organize my code effectively with many modules of various types. I have a three layered folder system. The parent directory contains the main.py file which imports and runs the main code. The modules are in a subfolder called lib, and different modules are placed in further subfolders. However, when I import one module from a subfolder, that module itself fails to import modules in the same sub directory. Sorry if this is a bad question, but I cannot figure out why the import statement isn't working, and I have looked at google and stack overflow and have not found any similar problem. All advice is welcome.



Parent Directory
---->lib
|--->module_group
|module_one.py(that tries but fails to import module_one)
|module_two.py
|main.py


In main I run



from lib.module_group.module_one import Module_One


Which works until an error is handled saying that there is no such module as module two. However, when I run module_one by itself, it works fine with the following import statement.



from module_two import Module_Two









share|improve this question



























    1















    I have been struggling to figure out how to organize my code effectively with many modules of various types. I have a three layered folder system. The parent directory contains the main.py file which imports and runs the main code. The modules are in a subfolder called lib, and different modules are placed in further subfolders. However, when I import one module from a subfolder, that module itself fails to import modules in the same sub directory. Sorry if this is a bad question, but I cannot figure out why the import statement isn't working, and I have looked at google and stack overflow and have not found any similar problem. All advice is welcome.



    Parent Directory
    ---->lib
    |--->module_group
    |module_one.py(that tries but fails to import module_one)
    |module_two.py
    |main.py


    In main I run



    from lib.module_group.module_one import Module_One


    Which works until an error is handled saying that there is no such module as module two. However, when I run module_one by itself, it works fine with the following import statement.



    from module_two import Module_Two









    share|improve this question

























      1












      1








      1


      2






      I have been struggling to figure out how to organize my code effectively with many modules of various types. I have a three layered folder system. The parent directory contains the main.py file which imports and runs the main code. The modules are in a subfolder called lib, and different modules are placed in further subfolders. However, when I import one module from a subfolder, that module itself fails to import modules in the same sub directory. Sorry if this is a bad question, but I cannot figure out why the import statement isn't working, and I have looked at google and stack overflow and have not found any similar problem. All advice is welcome.



      Parent Directory
      ---->lib
      |--->module_group
      |module_one.py(that tries but fails to import module_one)
      |module_two.py
      |main.py


      In main I run



      from lib.module_group.module_one import Module_One


      Which works until an error is handled saying that there is no such module as module two. However, when I run module_one by itself, it works fine with the following import statement.



      from module_two import Module_Two









      share|improve this question














      I have been struggling to figure out how to organize my code effectively with many modules of various types. I have a three layered folder system. The parent directory contains the main.py file which imports and runs the main code. The modules are in a subfolder called lib, and different modules are placed in further subfolders. However, when I import one module from a subfolder, that module itself fails to import modules in the same sub directory. Sorry if this is a bad question, but I cannot figure out why the import statement isn't working, and I have looked at google and stack overflow and have not found any similar problem. All advice is welcome.



      Parent Directory
      ---->lib
      |--->module_group
      |module_one.py(that tries but fails to import module_one)
      |module_two.py
      |main.py


      In main I run



      from lib.module_group.module_one import Module_One


      Which works until an error is handled saying that there is no such module as module two. However, when I run module_one by itself, it works fine with the following import statement.



      from module_two import Module_Two






      python-3.x import






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 26 '18 at 0:23









      jake_314jake_314

      308




      308
























          1 Answer
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          oldest

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          Set PYTHONPATH to the directory you want to act as your root. For example, if you want to use the following code:



          from lib.module_group.module_one import Module_One


          Then set PYTHONPATH to the directorying containing lib. For example:



          lib/module_group/module_one.py:



          from lib.module_group.module_two import Module_Two


          lib/module_group/module_two.py:



          class Module_Two:
          print('Loaded Module_Two')


          Then, to run module_one.py directly and still enable it to use lib.module_group.module_two to load Module_Two, use something like:



          $ PYTHONPATH="${PWD}:${PYTHONPATH}" python3 lib/module_group/module_one.py
          Loaded Module_Two





          share|improve this answer























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            1 Answer
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            1 Answer
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            active

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            active

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            1














            Set PYTHONPATH to the directory you want to act as your root. For example, if you want to use the following code:



            from lib.module_group.module_one import Module_One


            Then set PYTHONPATH to the directorying containing lib. For example:



            lib/module_group/module_one.py:



            from lib.module_group.module_two import Module_Two


            lib/module_group/module_two.py:



            class Module_Two:
            print('Loaded Module_Two')


            Then, to run module_one.py directly and still enable it to use lib.module_group.module_two to load Module_Two, use something like:



            $ PYTHONPATH="${PWD}:${PYTHONPATH}" python3 lib/module_group/module_one.py
            Loaded Module_Two





            share|improve this answer




























              1














              Set PYTHONPATH to the directory you want to act as your root. For example, if you want to use the following code:



              from lib.module_group.module_one import Module_One


              Then set PYTHONPATH to the directorying containing lib. For example:



              lib/module_group/module_one.py:



              from lib.module_group.module_two import Module_Two


              lib/module_group/module_two.py:



              class Module_Two:
              print('Loaded Module_Two')


              Then, to run module_one.py directly and still enable it to use lib.module_group.module_two to load Module_Two, use something like:



              $ PYTHONPATH="${PWD}:${PYTHONPATH}" python3 lib/module_group/module_one.py
              Loaded Module_Two





              share|improve this answer


























                1












                1








                1







                Set PYTHONPATH to the directory you want to act as your root. For example, if you want to use the following code:



                from lib.module_group.module_one import Module_One


                Then set PYTHONPATH to the directorying containing lib. For example:



                lib/module_group/module_one.py:



                from lib.module_group.module_two import Module_Two


                lib/module_group/module_two.py:



                class Module_Two:
                print('Loaded Module_Two')


                Then, to run module_one.py directly and still enable it to use lib.module_group.module_two to load Module_Two, use something like:



                $ PYTHONPATH="${PWD}:${PYTHONPATH}" python3 lib/module_group/module_one.py
                Loaded Module_Two





                share|improve this answer













                Set PYTHONPATH to the directory you want to act as your root. For example, if you want to use the following code:



                from lib.module_group.module_one import Module_One


                Then set PYTHONPATH to the directorying containing lib. For example:



                lib/module_group/module_one.py:



                from lib.module_group.module_two import Module_Two


                lib/module_group/module_two.py:



                class Module_Two:
                print('Loaded Module_Two')


                Then, to run module_one.py directly and still enable it to use lib.module_group.module_two to load Module_Two, use something like:



                $ PYTHONPATH="${PWD}:${PYTHONPATH}" python3 lib/module_group/module_one.py
                Loaded Module_Two






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 27 '18 at 19:14









                binkibinki

                3,30322953




                3,30322953
































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