Simple support for YAML configuration in Flask

flask-yact.py

import yact
from flask import Flask, Config, jsonify


# Build custom configuration object
class YactConfig(Config):
    """
    Customized config object
    Extends Flask config to support YAML via YACT
    """
    def from_yaml(self, config_file, directory=None):
        """
        All this method needs to do is load config
        from our config file, then *add* that config
        to the existing app config
        """
        config = yact.from_file(config_file, directory=directory)
        for section in config.sections:
            # Convention is to use all uppercase keys, we'll just force it
            self[section.upper()] = config[section]

# Override flask's default config class
Flask.config_class = YactConfig
app = Flask(__name__)
app.config.from_yaml('flask-yact.yaml')


@app.route('/')
def index():
    return app.name


@app.route('/config')
def config():
    return jsonify(app.config)


if __name__ == "__main__":
    # Note that we access uppercase 'PORT'
    app.run('localhost', port=app.config['PORT'])

flask-yact.yaml

---
debug: true
port: 9000