Home/ Questions/Error: systemerror parent module not loaded cannot perform relative import - how to solve it?
Next
Answered
Aaron Hardy
  • 15
Asked: 2022-05-17T13:03:32+00:00 In:

Error: systemerror parent module not loaded cannot perform relative import – how to solve it?

  • 15

. Advertisement .

..3..

. Advertisement .

..4..

I’m building a new program, but when I run it, an error pops up. The error displayed is as follows:

Traceback (most recent call last):
  File "D:/Users/Myname/Documents/PycharmProjects/myProgram/app/main.py", line 1, in <module>
  from .mymodule import myclass
 SystemError: Parent module '' not loaded, cannot perform relative import

I have tried several workarounds, but they still do not get the desired results. If you have come across this situation and have a solution for the “systemerror parent module not loaded cannot perform relative import” problem, pls let me know. Here is what I do:

myProgram
 └── app
  ├── __init__.py
  ├── main.py 
  └── mymodule.py
class myclass(object):
 
 def __init__(self):
  pass
 
 def myfunc(self):
  print("Hello!")
from .mymodule import myclass
 
 print("Test")
 testclass = myclass()
 testclass.myfunc()
from mymodule import myclass

Thanks!

systemerror
Share

2 Answers

  1. Best Answer
    Expert

    The cause: The Systemerror parent module is not loaded, so when python couldn’t import a particular module and its fuction or class from another module, it also cannot use relative import.

    Solution: This suggestion will help you resolve your problem:

    try:
from .mymodule import myclass
except Exception: #ImportError
from mymodule import myclass

    It means that your IDE will choose the right code site and your code will be managed to run through the python interpreter.

    • 8

  2. The same problem was mine, and I solved it using an absolute import rather than a relative.

    For example, in your case you might write this: 

    from app.mymodule import myclass

    The documentation explains this.

    Relative imports are determined by the current module’s name. Modules intended to be used as the main modules in a Python application should always use absolute imports, since the __main__ name is always the main module.

    Edit: To make the interpreter recognize the __init__.py file as a package, you should add it to your app directory. It’s fine if the file doesn’t exist.

    • 5

Leave an answer

You must login to add an answer.

Need An Account,