added 3rd party packages, elog, bigtree

python37/packages/bigtree/utils/exceptions.py

@@ -0,0 +1,32 @@
+class TreeError(Exception):
+    pass
+
+
+class LoopError(TreeError):
+    """Error during node creation"""
+
+    pass
+
+
+class CorruptedTreeError(TreeError):
+    """Error during node creation or tree creation"""
+
+    pass
+
+
+class DuplicatedNodeError(TreeError):
+    """Error during tree creation"""
+
+    pass
+
+
+class NotFoundError(TreeError):
+    """Error during tree creation or tree search"""
+
+    pass
+
+
+class SearchError(TreeError):
+    """Error during tree search"""
+
+    pass