尽管PyCharm具有自动填充功能，但ValueError尝试了相对导入而不是顶级软件包

Question

I am attempting to import a model from a sibling package and am getting

ValueError: attempted relative import beyond top-level package

Strangely, I am auto-filling based on PyCharm suggestions, so the IDE is registering the module, but my build is failing...

] 1

Here is my project structure:

app
 \
  +-core
  |  \
  |   +- __init__.py
  |   +- models.py   <- the Tag model is present here
  |
  +-scheduler
  |  \
  |   +- __init__.py
  |   +- serializers.py  <- importing app.core.models.Tag in this file
  |
  +- __init__.py

app.scheduler.serializers.py:

from rest_framework import serializers
from ..core.models import Tag


class TagSerializer(serializers.ModelSerializer):
    """Serializer for tag objects"""

    class Meta:
        model = Tag
        fields = ('id', 'name')
        read_only_fields = ('id',)

I've been scratching my head about this and can't seem to figure it out...

I've tried using an absolute path, even adding it using the PyCharm import utility:

from rest_framework import serializers
from app.core.models import Tag


class TagSerializer(serializers.ModelSerializer):
    """Serializer for tag objects"""

    class Meta:
        model = Tag
        fields = ('id', 'name')
        read_only_fields = ('id',)

but then I get: ModuleNotFoundError: No module named 'app.core'

I am running using

python manage.py runserver

Answer 1

The real answer was that the top level app folder is not included in the python path, I referred to this stack overflow answer regarding how:

... python doesn't record where a package was loaded from. So when you do python -m test_A.test, it basically just discards the knowledge that test_A.test is actually stored in package ...

And recommended using from core.models import Tag and it seems to work.