Initial

app/app.py

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+from flask import Flask
+from app.config.config import get_config_by_name
+from app.initialize_functions import initialize_route,initialize_db
+
+def create_app(config=None) -> Flask:
+    """
+    Create a Flask application.
+
+    Args:
+        config: The configuration object to use.
+
+    Returns:
+        A Flask application instance.
+    """
+    app = Flask(__name__)
+    if config:
+        app.config.from_object(get_config_by_name(config))
+
+    # Initialize extensions
+    initialize_db(app)
+
+    # Register blueprints
+    initialize_route(app)
+
+    return app

app/config/config.py

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+class BaseConfig:
+    """Base configuration."""
+    DEBUG = False
+    TESTING = False
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+    SECRET_KEY = 'your-secret-key'
+
+class DevelopmentConfig(BaseConfig):
+    """Development configuration."""
+    DEBUG = True
+    SQLALCHEMY_DATABASE_URI = 'sqlite:///development.db'
+
+class TestingConfig(BaseConfig):
+    """Testing configuration."""
+    DEBUG = True
+    TESTING = True
+    SQLALCHEMY_DATABASE_URI = 'sqlite:///testing.db'
+
+class ProductionConfig(BaseConfig):
+    """Production configuration."""
+    DEBUG = False
+    SQLALCHEMY_DATABASE_URI = 'sqlite:///production.db'
+
+
+def get_config_by_name(config_name):
+    """ Get config by name """
+    if config_name == 'development':
+        return DevelopmentConfig()
+    elif config_name == 'production':
+        return ProductionConfig()
+    elif config_name == 'testing':
+        return TestingConfig()
+    else:
+        return DevelopmentConfig()

app/db/db.py

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+from flask_sqlalchemy import SQLAlchemy
+from sqlalchemy.orm import DeclarativeBase
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+db = SQLAlchemy(model_class=Base)

app/initialize_functions.py

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+from flask import Flask
+from app.modules.main.route import main_bp
+from app.db.db import db
+
+
+def initialize_route(app: Flask):
+    with app.app_context():
+        app.register_blueprint(main_bp)
+
+
+def initialize_db(app: Flask):
+    with app.app_context():
+        db.init_app(app)
+        db.create_all()

app/modules/main/controller.py

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+class MainController:
+    def index(self):
+        return {'message':'Hello, World!'}

app/modules/main/main_tests.py

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+import unittest
+import json
+
+from app.modules.main.controller import MainController
+
+
+def test_index():
+    main_controller = MainController()
+    result = main_controller.index()
+    assert result == {'message': 'Hello, World!'}

app/modules/main/route.py

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+from flask import Blueprint, make_response, jsonify
+from .controller import MainController
+
+main_bp = Blueprint('main', __name__)
+
+main_controller = MainController()
+
+@main_bp.route('/')
+def index():
+    result=main_controller.index()
+    return make_response(jsonify(data=result))

app/tests/conftest.py

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+import pytest
+
+from app.app import create_app
+
+
+@pytest.fixture
+def app():
+    app = create_app('testing')
+    app.config.update({"TESTING": True})
+    yield app
+
+
+@pytest.fixture
+def client(app):
+    return app.test_client()