Merge pull request #379 add external error code

Author: rekby

ydb/issues.py

@@ -41,6 +41,7 @@ class StatusCode(enum.IntEnum):
     UNDETERMINED = _apis.StatusIds.UNDETERMINED
     UNSUPPORTED = _apis.StatusIds.UNSUPPORTED
     SESSION_BUSY = _apis.StatusIds.SESSION_BUSY
+    EXTERNAL_ERROR = _apis.StatusIds.EXTERNAL_ERROR
 
     CONNECTION_LOST = _TRANSPORT_STATUSES_FIRST + 10
     CONNECTION_FAILURE = _TRANSPORT_STATUSES_FIRST + 20
@@ -170,6 +171,10 @@ class SessionBusy(Error):
     status = StatusCode.SESSION_BUSY
 
 
+class ExternalError(Error):
+    status = StatusCode.EXTERNAL_ERROR
+
+
 class SessionPoolEmpty(Error, queue.Empty):
     status = StatusCode.SESSION_POOL_EMPTY
 
@@ -211,6 +216,7 @@ def _format_response(response: ydb_operation_pb2.Operation) -> str:
     StatusCode.UNDETERMINED: Undetermined,
     StatusCode.UNSUPPORTED: Unsupported,
     StatusCode.SESSION_BUSY: SessionBusy,
+    StatusCode.EXTERNAL_ERROR: ExternalError,
 }