Runtime.ImportModuleError: Unable to import module 'vc__handler__python' if the root folder is set one level above the server folder on vercel

I recently watched video “Deploy Django Project on Vercel with Supabase PostgreSQL: Step by Step Guide”. I followed this video step by step, and my project was really deployed. But it deployed if i picked my folder python_server/ as root directory. But I need to select the folder one level up as root directory. I have project structure like this:

    Project/
    ├── python_server/
    │   ├── __init__.py
    │   ├── mysite/
    │   │   ├── __init__.py
    │   │   ├── settings.py
    │   │   ├── urls.py
    │   │   ├── wsgi.py
    │   ├── manage.py
    │   ├── gif_service/
    │   │   ├── templates
    │   │   ├── views.py
    │   │   ├── urls.py
    │   ├── static
    │   ├── staticfiles
    ├── public
    ├── views
    ├── js_server

I copied my static files from /public and views from /views to /python_server. And I picked /python_server as folder root. It’s works well for vercel. But it’s not good for me. Because I use views from /views and static files from /public for both server: Express server and Django. And so It’s not good practice to have copy of that static and html files. So I need to deploy vercel not with python_server/ as root folder, but with Project/ as root folder.

I really tried many configuration options but always I get:

and in runtime logs something like:

[ERROR] Runtime.ImportModuleError: Unable to import module 'vc__handler__python': No module named 'mysite' Traceback (most recent call last):INIT_REPORT Init Duration: 1798.90 ms Phase: invoke Status: error Error Type: Runtime.Unknown

or

[ERROR] Runtime.ImportModuleError: Unable to import module 'vc__handler__python': No module named 'django' Traceback (most recent call last):INIT_REPORT Init Duration: 1798.90 ms Phase: invoke Status: error Error Type: Runtime.Unknown

My build_files.sh and vercel.json in python_server/ are like this:

build_files.sh:

    #!/bin/bash
    
    pip install setuptools
    pip install -r requirements.txt
    
    python manage.py makemigrations
    python manage.py migrate
    python manage.py tailwind install
    python manage.py collectstatic
    python manage.py tailwind start

vercel.json:

    {
      "version": 2,
      "builds": [
        {
          "src": "mysite/wsgi.py",
          "use": "@vercel/python",
          "config": { "maxLambdaSize": "15mb",
          "runtime": "python3.10",
          "buildCommand": "bash build_files.sh"
         }  
        }
      ],
      "routes": [
        {
          "src": "/(.*)",
          "dest": "mysite/wsgi.py"
        },
        {
          "src": "/static/(.*)",
          "dest": "/static/$1"
        }
      ]
    }

requirements.txt:

    asgiref==3.8.1
    Django==5.1
    django-environ==0.11.2
    django-tailwind==3.8.0
    psycopg2-binary==2.9.9
    sqlparse==0.5.1
    typing_extensions==4.12.2
    tzdata==2024.1
    whitenoise==6.7.0

I already tried to move vercel.json, build_files.sh and requirements.txt to Project/ folder and change "src": "mysite/wsgi.py" to "src": "python_server/mysite/wsgi.py" and "dest": "mysite/wsgi.py" to "dest": "python_server/mysite/wsgi.py" in vercel.json. I tried to use build_files.sh like this:

    #!/bin/bash
    
    pip install setuptools
    pip install -r requirements.txt
    
    python python_server/manage.py makemigrations
    python python_server/manage.py migrate
    python python_server/manage.py tailwind install
    python python_server/manage.py collectstatic
    python python_server/manage.py tailwind start

But I got error.

Also I tried to change build_files.sh to this:

    #!/bin/bash
    cd /python_server
    pip install setuptools
    pip install -r requirements.txt

    python manage.py makemigrations
    python manage.py migrate
    python manage.py tailwind install
    python manage.py collectstatic
    python manage.py tailwind start

I got error again.

I even tried to change "buildCommand": "bash build_files.sh" to "buildCommand": "cd python_server && bash build_files.sh" or even change build_files.sh to this:

    #!/bin/bash
    export PYTHONPATH=$(pwd)/python_server
    
    pip install setuptools
    pip install -r requirements.txt
    
    python manage.py makemigrations
    python manage.py migrate
    python manage.py tailwind install
    python manage.py collectstatic
    python manage.py tailwind start

But I always got the same error:

[ERROR] Runtime.ImportModuleError: Unable to import module 'vc__handler__python': No module named 'mysite' Traceback (most recent call last):INIT_REPORT Init Duration: 1798.90 ms Phase: invoke Status: error Error Type: Runtime.Unknown

or

[ERROR] Runtime.ImportModuleError: Unable to import module 'vc__handler__python': No module named 'django' Traceback (most recent call last):INIT_REPORT Init Duration: 1798.90 ms Phase: invoke Status: error Error Type: Runtime.Unknown

#!/bin/bash
# Clear pip cache
pip cache purge

# Install dependencies
pip install setuptools
pip install -r requirements.txt

# Run Django management commands
python manage.py makemigrations
python manage.py migrate
python manage.py collectstatic --noinput

{
    "builds": [
        {
            "src": "DjangoEcommerce/wsgi.py",
            "use": "@vercel/python",
            "config": {
                "maxLambdaSize": "15mb",
                "runtime": "python3.12",
                "buildCommand": "bash setup.sh"
            }
        }
    ],
    "routes": [
        {
            "src": "/(.*)",
            "dest": "/DjangoEcommerce/wsgi.py"
        },
        {
            "src": "/static/(.*)",
            "dest": "/static/$1"
        }
    ]
}

    chmod +x setup.sh