def set_chain_class(self, chain_identifier):
if isinstance(chain_identifier, type):
self.chain_class = chain_identifier
elif is_string(chain_identifier):
if chain_identifier.lower() in CHAIN_IDENTIFIER_MAP:
self.chain_class = CHAIN_IDENTIFIER_MAP[chain_identifier.lower()]
else:
try:
import_string(chain_identifier)
except ImportError:
raise ValueError(UNSUPPORTED_CHAIN_IDENTIFIER_MSG.format(chain_identifier))
else:
self.chain_class = chain_identifier
else:
raise ValueError(UNSUPPORTED_CHAIN_IDENTIFIER_MSG.format(chain_identifier))
def set_chain_class(self, chain_identifier):
if isinstance(chain_identifier, type):
self.chain_class = chain_identifier
elif is_string(chain_identifier):
if chain_identifier.lower() in CHAIN_IDENTIFIER_MAP:
self.chain_class = CHAIN_IDENTIFIER_MAP[
chain_identifier.lower()]
else:
try:
import_string(chain_identifier)
except ImportError:
raise ValueError(
UNSUPPORTED_CHAIN_IDENTIFIER_MSG.format(
chain_identifier))
else:
self.chain_class = chain_identifier
else:
raise ValueError(
UNSUPPORTED_CHAIN_IDENTIFIER_MSG.format(chain_identifier))
def set_backend_class(self, backend_identifier):
if isinstance(backend_identifier, type):
self.backend_class = backend_identifier
elif is_string(backend_identifier):
if backend_identifier.lower() in self.backend_class_shortnames:
self.backend_class = self.backend_class_shortnames[
backend_identifier.lower()]
else:
try:
import_string(backend_identifier)
except ImportError:
raise ValueError(
UNSUPPORTED_BACKEND_IDENTIFIER_MSG.format(','.join(
tuple(self.backend_class_shortnames.keys()))))
else:
self.backend_class = backend_identifier
else:
raise ValueError(
UNSUPPORTED_BACKEND_IDENTIFIER_MSG.format(','.join(
tuple(self.backend_class_shortnames.keys()))))
def set_provider_class(self, provider_identifier):
if isinstance(provider_identifier, type):
self.provider_class = provider_identifier
elif is_string(provider_identifier):
if provider_identifier.lower() in PROVIDER_IDENTIFIER_MAP:
self.provider_class = PROVIDER_IDENTIFIER_MAP[
provider_identifier.lower()]
else:
try:
import_string(provider_identifier)
except ImportError:
raise ValueError(
UNSUPPORTED_PROVIDER_IDENTIFIER_MSG.format(
provider_identifier))
else:
self.provider_class = provider_identifier
else:
raise ValueError(
UNSUPPORTED_PROVIDER_IDENTIFIER_MSG.format(
provider_identifier))