Create a Flask application using the app factory pattern.

flask-tenant-subdomain.py

#app.py
def create_app(settings_override=None):
    """
    Create a Flask application using the app factory pattern.

    :param settings_override: Override settings
    :return: Flask app
    """
    app = Flask(__name__, instance_relative_config=True, static_folder=None)
    #flask-tenant-schema:
    #Subdomains in Flask
    app.static_folder = 'static'
    app.add_url_rule('/static/<path:filename>',
                  endpoint='static',
                  subdomain='<tenant>',
                  view_func=app.send_static_file)
    app.config.from_object('config.settings')
    app.config.from_pyfile('settings.py', silent=True)

    if settings_override:
        app.config.update(settings_override)

    app.register_blueprint(user)
    extensions(app)
    authentication(app, User)

    return app

#user.views.py
from flask import Blueprint, render_template
page = Blueprint('page', __name__, template_folder='templates', subdomain='<tenant>')

@page.route('/')
def home(tenant):
    return render_template('page/home.html')


#extensions.py
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import MetaData
from flask_login import LoginManager

db = SQLAlchemy()