Firstly, this import statement:
from models import some_model
should be namespaced:
# in myproject/backend/backend.py or myproject/api/api.py
from myproject.models import some_model
Then you will need to get the directory which contains myproject, let’s call this /path/to/parent, into the sys.path list. You can do this temporarily by setting an environment variable:
export PYTHONPATH=/path/to/parent
Or, preferably, you can do it by writing a setup.py file and installing your package. Follow the PyPA packaging guide. After you have written your setup.py file, from within the same directory, execute this to setup the correct entries in sys.path:
pip install --editable .