envs_library_parse_env_vars_with_defaults_and_type_casting.py

1from envs import env
2
3# Get an environment variable, providing a default value if it doesn't exist
4# This will return the value as a string by default
5FLASK_ENV = env('FLASK_ENV', 'development')
6
7# Get an environment variable and cast it to a specific type (e.g., int)
8PORT = env('PORT', 5000)
9
10# Get an environment variable and cast it to a boolean
11DEBUG = env('DEBUG', False)
12
13# You can also parse lists from comma-separated strings
14ALLOWED_HOSTS = env('ALLOWED_HOSTS', ['localhost', '127.0.0.1'])
15
16if __name__ == "__main__":
17    print(f"Flask Env: {FLASK_ENV}")
18    print(f"Port: {PORT} ({type(PORT)})")
19    print(f"Debug: {DEBUG} ({type(DEBUG)})")
20    print(f"Allowed Hosts: {ALLOWED_HOSTS} ({type(ALLOWED_HOSTS)})")