Init of flask app (replace : with / in filename)

application:__init__.py

from flask import Flask
from flask_sqlalchemy import SQLAlchemy

database = SQLAlchemy()


class Application:
    def __init__(self, port: int = 5000, debug: bool = True):

        self.port: int = port
        self.debug: bool = debug
        self.db = database
        self.app = Flask(__name__)
        self.app.config['SECRET_KEY'] = 'REDACTED'
        self.app.config['TEMPLATES_AUTO_RELOAD'] = True
        self.app.config['SQLALCHEMY_DATABASE_URI'] = 'REDACTED'
        self.db.init_app(self.app)

    def init_routes(self):
        from application.routes import home

        self.app.register_blueprint(home)

    def run(self):
        self.init_routes()
        Flask.run(self.app, port=self.port, debug=self.debug, host='127.0.0.1')