env_vars_implementation

from aws_lambda_powertools.middleware_factory import lambda_handler_decorator from pydantic import BaseModel, ValidationError

# global isntance of the parsed Pydantic data class ENV_CONF: Type[BaseModel] = None

@lambda_handler_decorator def init_environment_variables(handler, event, context, model: Type[BaseModel]) -> Any: global ENV_CONF try: # parse the os enviorment variables dict ENV_CONF = model(**os.environ) except (ValidationError, TypeError) as exc: raise ValueError(f'failed to load environment variables, exception={str(exc)}') from exc

return handler(event, context)

def get_environment_variables() -> Type[BaseModel]: global ENV_CONF if ENV_CONF is None: raise ValueError('get_environment_variables was called before init_environment_variables, environment variables were not loaded') return ENV_CONF