def get_driver_by_provider(provider):
if provider is None:
provider = config.PROVIDER.default_router_provider
elif provider not in ROUTER_DRIVERS:
raise nexc.ProviderNotFound(provider=provider)
return ROUTER_DRIVERS[provider]
def get_provider_with_default(provider):
if not attr.is_attr_set(provider):
provider = config.PROVIDER.default_router_provider
elif provider not in ROUTER_DRIVERS:
raise nexc.ProviderNotFound(provider=provider)
return provider