developers.home-assistant/docs/dev_101_config.md

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Config

On the hass object there is an instance of the Config class. The Config class contains the users preferred units, the path to the config directory and which components are loaded.

Name	Type	Description
latitude	float	Latitude of the instance location
longitude	float	Longitude of the instance location
elevation	int	Elevation of the instance
location_name	str	Name of the instance
time_zone	str	Timezone
units	UnitSystem	Unit system
internal_url	str	URL the instance can be reached on internally
external_url	str	URL the instance can be reached on externally
currency	str	Preferred currency
country	str	Country the instance is in
language	str	Preferred language
config_source	ConfigSource	If the configuration was set via the UI or stored in YAML
skip_pip	bool	If True, pip install is skipped for requirements on startup
skip_pip_packages	list[str]	List of packages to skip when installing requirements on startup
components	set[str]	List of loaded components
api	ApiConfig	API (HTTP) server configuration
config_dir	str	Directory that holds the configuration
allowlist_external_dirs	set[str]	List of allowed external dirs to access
allowlist_external_urls	set[str]	List of allowed external URLs that integrations may use
media_dirs	dict[str, str]	Dictionary of Media folders that integrations may use
safe_mode	bool	If Home Assistant is running in safe mode
legacy_templates	bool	Use legacy template behavior

It also provides some helper methods. See available methods.