Relative imports - ModuleNotFoundError No module named x

Question

This is the first time I ve really sat down and tried python 3  and seem to be failing miserably  I have the following two files   test py config py  config py has a few functions defined in it as well as a few variables  I ve stripped it down to the following  config py debug   True  test py import config print  config debug   I also have an   init   py However  I m getting the following error  ModuleNotFoundError  No module named  config   I m aware that the py3 convention is to use absolute imports  from   import config  However  this leads to the following error  ImportError  cannot import name  config   So I m at a loss as to what to do here    Any help is greatly appreciated

User · Answer

Set PYTHONPATH environment variable in root project directory   Considering UNIX-like   export PYTHONPATH

User · Answer

I figured it out  Very frustrating  especially coming from python2   You have to add a   to the module  regardless of whether or not it is relative or absolute   I created the directory setup as follows    main py -- lib   --   init   py   -- mody py   -- modx py   modx py  def does something        return  I gave you this string     mody py  from modx import does something  def loaded        string   does something       print string    main py  from lib import mody  mody loaded     when I execute main  this is what happens    python main py Traceback  most recent call last     File  main py   line 2  in  lt module gt      from lib import mody   File   mnt c Users Austin Dropbox Source Python virtualenviron mock package lib mody py   line 1  in  lt module gt      from modx import does something ImportError  No module named  modx    I ran 2to3  and the core output was this  RefactoringTool  Refactored lib mody py --- lib mody py  original      lib mody py  refactored     -1 4  1 4    -from modx import does something  from  modx import does something   def loaded         string   does something   RefactoringTool  Files that need to be modified  RefactoringTool  lib modx py RefactoringTool  lib mody py   I had to modify mody py s import statement to fix it  try      from modx import does something except ImportError      from  modx import does something   def loaded        string   does something       print string    Then I ran main py again and got the expected output    python main py I gave you this string    Lastly  just to clean it up and make it portable between 2 and 3   from   future   import absolute import from  modx import does something

User · Answer

If you are using python 3  then try adding below lines  import os  sys dir path   os path dirname os path realpath   file     parent dir path   os path abspath os path join dir path  os pardir   sys path insert 0  parent dir path

User · Answer

Setting PYTHONPATH can also help with this problem    Here is how it can be done on Windows  set PYTHONPATH

User · Answer

This example works on Python 3 6   I suggest going to Run - gt  Edit Configurations in PyCharm  deleting any entries there  and trying to run the code through PyCharm again   If that doesn t work  check your project interpreter  Settings -  Project Interpreter  and run configuration defaults  Run -  Edit Configurations

User · Answer

For me  simply adding the current directory worked  Using the following structure   -- myproject      -- a py      -- b py  a py  from b import some object   returns ModuleNotFound error  from myproject b import some object   works

User · Answer

As was stated in the comments to the original post  this seemed to be an issue with the python interpreter I was using for whatever reason  and not something wrong with the python scripts  I switched over from the WinPython bundle to the official python 3 6 from python org and it worked just fine  thanks for the help everyone

User · Answer

You can simply add following file to your tests directory  and then python will run it before the tests    init   py file  import os import sys sys path insert 0  os path abspath os path join os path dirname   file

User · Answer

TL DR  You can t do relative imports from the file you execute since   main   module is not a part of a package  Absolute imports - import something available on sys path Relative imports - import something relative to the current module  must be a part of a package If you re running both variants in exactly the same way  one of them should work  Here is an example that should help you understand what s going on  Let s add another main py file with the overall directory structure like this      main py   ryan   init   py   ryan config py   ryan test py  And let s update test py to see what s going on    config py debug   True    test py print   name     try        Trying to find module in the parent package     from   import config     print config debug      del config except ImportError      print  Relative import failed    try        Trying to find module on sys path     import config     print config debug  except ModuleNotFoundError      print  Absolute import failed      main py import ryan test  Let s run test py first    python ryan test py   main   Relative import failed True  Here  quot test quot  is the   main   module and doesn t know anything about belonging to a package  However import config should work  since the ryan folder will be added to sys path  Let s run main py instead    python main py ryan test True Absolute import failed  And here test is inside of the  quot ryan quot  package and can perform relative imports  import config fails since implicit relative imports are not allowed in Python 3  Hope this helped  P S   If you re sticking with Python 3 there is no more need for   init   py files

User · Answer

Tried your example  from   import config      got the following SystemError     usr bin python3 4 test py   Traceback  most recent call last       File  test py   line 1  in        from   import config   SystemError  Parent module    not loaded  cannot perform relative import       This will work for me   import config print  debug  s  config debug    gt  gt  gt debug True   Tested with Python 3 4 2 - PyCharm 2016 3 2    Beside this PyCharm offers you to Import this name  You hav to click on config and a help icon appears

User · Answer

Try   from   import config   What that does is import from the same folder level  If you directly try to import it assumes it s a subordinate

User · Answer

You have to append your project s path to PYTHONPATH and make sure to use absolute imports   For UNIX  Linux  OSX       export PYTHONPATH  quot   PYTHONPATH   path to your project  quot   For Windows set PYTHONPATH  PYTHONPATH  C  path to your project    Absolute imports Assuming that we have the following project structure   -- myproject      -- mypackage           -- a py      -- anotherpackage          -- b py          -- c py          -- mysubpackage              -- d py  just make sure to reference each import starting from the project s root directory  For instance    in module a py import anotherpackage mysubpackage d    in module b import anotherpackage c import mypackage a   For a more comprehensive explanation  refer to the article How to fix ModuleNotFoundError and ImportError

User · Answer

Declare correct sys path list before you call module   import os  sys     home user example parent child  current path   os path abspath          home user example parent  parent path   os path dirname current path   sys path append parent path  os environ setdefault  DJANGO SETTINGS MODULE    child settings

[python] Relative imports - ModuleNotFoundError: No module named x

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