Add QlibException

qlib/utils/exceptions.py

@@ -0,0 +1,12 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+# Base exception class
+class QlibException(Exception):
+    def __init__(self, message):
+        super(QlibException, self).__init__(message)
+
+
+# Error type for reinitialization when starting an experiment
+class RecorderInitializationError(QlibException):
+    pass