config

import os from config import Config # Create a dummy config file for demonstration config_content = """ [DEFAULT] log_level: INFO data_path: /var/data [server] host: 127.0.0.1 port: ${server.default_port|8080} base_url: http://${server.host}:${server.port} [database] type: postgres host: db.example.com user: ${DB_USER|guest} password: ${DB_PASSWORD|} """ with open('example.cfg', 'w') as f: f.write(config_content) # Set environment variables for demonstration os.environ['DB_USER'] = 'admin' os.environ['DB_PASSWORD'] = os.environ.get('TEST_DB_PASSWORD', 's3cr3t_p@ssw0rd') # Load the configuration cfg = Config('example.cfg') # Access configuration values print(f"Log Level: {cfg.log_level}") print(f"Server Host: {cfg.server.host}") print(f"Server Port: {cfg.server.port}") print(f"Base URL: {cfg.server.base_url}") print(f"DB User: {cfg.database.user}") print(f"DB Password: {cfg.database.password}") # Clean up the dummy config file os.remove('example.cfg') # Example of overriding a default with an environment variable # The config file specifies `default_port: 8080`, but the example config uses a direct reference. # Let's show how an environment variable for `DB_USER` works. # Expected output for DB User: admin (from environment variable) # Expected output for DB Password: s3cr3t_p@ssw0rd (from environment variable, if TEST_DB_PASSWORD is not set)