Python ModuleNotFoundError when trying to import module from imported package

Question

I m using Python 3 7 1 on macOS Mojave Version 10 14 1  This is my directory structure   man                              Mans                              man1 py   MansTest            SoftLib                    Soft                        SoftWork                                manModules py           Unittests                      man1test py   man1 py contains the following import statement  which I do not want to change   from Soft SoftWork manModules import     man1test py contains the following import statements   from    MansTest SoftLib import Soft from    Mans import man1   I need the second import in man1test py because man1test py needs access to a function in man1 py   My rationale behind the first import  Soft  was to facilitate the aforementioned import statement in man1 py   Contrary to my expectation  however  the import statement in man1 py gives rise to   ModuleNotFoundError  No module named  Soft    when I run  python3 -m man MansTest Unittests man1test   from a directory above man    Is there any way to resolve this error without changing the import statement in man1 py and without adding anything to sys path   Edit  python3 -m man ManTest Unittests man1test from the original version of the question changed to python3 -m man MansTest Unittests man1test

User · Answer

For me when I created a file and saved it as python file  I was getting this error during importing  I had to create a filename with the type  quot  py quot    like  filename py and then save it as a python file  post trying to import the file worked for me

User · Answer

FIRST  if you want to be able to access man1 py from man1test py AND manModules py from man1 py  you need to properly setup your files as packages and modules   Packages are a way of structuring Python   s module namespace by using    dotted module names     For example  the module name A B designates a submodule named B in a package named A      When importing the package  Python searches through the directories on sys path looking for the package subdirectory  The   init   py files are required to make Python treat the directories as containing packages  this is done to prevent directories with a common name  such as string  from unintentionally hiding valid modules that occur later on the module search path   You need to set it up to something like this  man  -   init   py  - Mans     -   init   py     - man1 py  - MansTest     -   init    py     - SoftLib        - Soft           -   init   py           - SoftWork              -   init   py              - manModules py        - Unittests           -   init   py           - man1test py  SECOND  for the  quot ModuleNotFoundError  No module named  Soft  quot  error caused by from    Mans import man1 in man1test py  the documented solution to that is to add man1 py to sys path since Mans is outside the MansTest package  See The Module Search Path from the Python documentation  But if you don t want to modify sys path directly  you can also modify PYTHONPATH   sys path is initialized from these locations   The directory containing the input script  or the current directory when no file is specified   PYTHONPATH  a list of directory names  with the same syntax as the shell variable PATH   The installation-dependent default    THIRD  for from    MansTest SoftLib import Soft which you said  quot was to facilitate the aforementioned import statement in man1 py quot   that s now how imports work  If you want to import Soft SoftLib in man1 py  you have to setup man1 py to find Soft SoftLib and import it there directly  With that said  here s how I got it to work  man1 py  from Soft SoftWork manModules import     no change to import statement but need to add Soft to PYTHONPATH  def foo        print  quot called foo in man1 py quot       print  quot foo call module1 from manModules   quot    module1     man1test py   no need for  quot from    MansTest SoftLib import Soft quot  to facilitate importing   from    Mans import man1  man1 foo    manModules py def module1        return  quot module1 in manModules quot   Terminal output    python3 -m man MansTest Unittests man1test Traceback  most recent call last             from    Mans import man1   File  quot  temp man Mans man1 py quot   line 2  in  lt module gt      from Soft SoftWork manModules import   ModuleNotFoundError  No module named  Soft     PYTHONPATH  PYTHONPATH  temp man MansTest SoftLib   export PYTHONPATH   echo  PYTHONPATH   temp man MansTest SoftLib   python3 -m man MansTest Unittests man1test called foo in man1 py foo called module1 from manModules  module1 in manModules    As a suggestion  maybe re-think the purpose of those SoftLib files  Is it some sort of  quot bridge quot  between man1 py and man1test py  The way your files are setup right now  I don t think it s going to work as you expect it to be  Also  it s a bit confusing for the code-under-test  man1 py  to be importing stuff from under the test folder  MansTest

[python] Python: 'ModuleNotFoundError' when trying to import module from imported package

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