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

qlib/workflow/__init__.py

@@ -7,6 +7,7 @@ from .expm import MLflowExpManager
 from .exp import Experiment
 from .recorder import Recorder
 from ..utils import Wrapper
+from ..utils.exceptions import RecorderInitializationError
 
 
 class QlibRecorder:
@@ -525,12 +526,6 @@ class QlibRecorder:
         self.get_exp().get_recorder().set_tags(**kwargs)
 
 
-# error type for reinitialization when starting an experiment
-class RecorderInitializationError(Exception):
-    def __init__(self, message):
-        super(RecorderInitializationError, self).__init__(message)
-
-
 class RecorderWrapper(Wrapper):
     """
     Wrapper class for QlibRecorder, which detects whether users reinitialize qlib when already starting an experiment.