for IDE auto-complete with global Wrapper

R, D, Cal, Inst, FeatureD, ExpressionD, DatasetD, D

qlib/workflow/__init__.py

@@ -38,7 +38,9 @@ class QlibRecorder:
         try:
             yield run
         except Exception as e:
-            self.end_exp(Recorder.STATUS_FA)  # end the experiment if something went wrong
+            self.end_exp(
+                Recorder.STATUS_FA
+            )  # end the experiment if something went wrong
             raise e
         self.end_exp(Recorder.STATUS_FI)
 
@@ -461,5 +463,14 @@ class QlibRecorder:
         self.get_exp().get_recorder().set_tags(**kwargs)
 
 
+import sys
+
+if sys.version_info >= (3, 9):
+    from typing import Annotated
+
+    QlibRecorderWrapper = Annotated[QlibRecorder, Wrapper]
+else:
+    QlibRecorderWrapper = QlibRecorder
+
 # global record
-R = Wrapper()
+R: QlibRecorderWrapper = Wrapper()