be removed in 3.0
Client Error.
400: ('bad_request', 'bad'),
401: ('unauthorized',),
402: ('payment_required...,
405: ('method_not_allowed', 'not_allowed'),
406: ('not_acceptable',),
407: ('proxy_authentication_required...',),
412: ('precondition_failed', 'precondition'),
413: ('request_entity_too_large',),
414: ('request_uri_too_large...424: ('failed_dependency', 'dependency'),
425: ('unordered_collection', 'unordered'),
426: ('upgrade_required...', 'upgrade'),
428: ('precondition_required', 'precondition'),
429: ('too_many_requests', 'too_many')