9zVZVWRJ

1import os
2
3from flask import Flask
4
5def create_app(test_config=None):
6    # create and configure the app object
7    # __name__ is the name of the current Python module
8    app = Flask(__name__, instance_relative_config=True)
9    app.config.from_mapping(
10        SECRET_KEY='dev', # override with a random value when deploying
11        DATABASE=os.path.join(app.instance_path, 'flaskr.sqlite'),
12    )
13    
14    if test_config is None:
15        # load the instance config, if it exists, when not testing
16        # this is a good place to set a real SECRET_KEY
17        app.config.from_pyfile('config.py', silent=True)
18    else:
19        # load the test config, if it was passed in
20        app.config.from_mapping(test_config)
21
22    # the instance folder should exist
23    try:
24        os.makedirs(app.instance_path)
25    except OSError:
26        pass
27    
28    # and now a page that says hello
29    @app.route('/hello')
30    def hello():
31        return "Hello, World!"
32
33    # configure the database
34    from . import db
35    db.init_app(app)
36
37    # having configured the app object, return it from the factory function    
38    return app