manage.py

import click
from flask.cli import FlaskGroup
from app import create_app, db

app = create_app()
cli = FlaskGroup(create_app=create_app)

@cli.command("init-db")
def init_db():
    """Initialize the database."""
    click.echo("Creating database tables...")
    db.create_all()
    click.echo("Database tables created!")

@cli.command("run")
def run():
    """Run the application."""
    app.run()

@cli.command("test")
def test():
    """Run the tests."""
    import pytest
    pytest.main(['tests'])

if __name__ == "__main__":
    cli()