more types

IPython/core/inputsplitter.py

@@ -32,6 +32,7 b' import tokenize'
 import warnings
 
 from typing import List, Tuple, Union, Optional
+from typing_extensions import Self
 from types import CodeType
 
 from IPython.core.inputtransformer import (leading_indent,
@@ -637,9 +638,9 b' class IPythonInputSplitter(InputSplitter):'
                 # Nothing that calls reset() expects to handle transformer
                 # errors
                 pass
-    
-    def flush_transformers(self):
-        def _flush(transform, outs):
+
+    def flush_transformers(self: Self):
+        def _flush(transform, outs: List[str]):
             """yield transformed lines
 
             always strings, never None

IPython/core/interactiveshell.py

@@ -281,13 +281,14 b' class ExecutionInfo(object):'
         )
 
 
-class ExecutionResult(object):
+class ExecutionResult:
     """The result of a call to :meth:`InteractiveShell.run_cell`
 
     Stores information about what took place.
     """
-    execution_count = None
-    error_before_exec = None
+
+    execution_count: Optional[int] = None
+    error_before_exec: Optional[bool] = None
     error_in_exec: Optional[BaseException] = None
     info = None
     result = None
@@ -477,7 +478,8 b' class InteractiveShell(SingletonConfigurable):'
     def input_transformers_cleanup(self):
         return self.input_transformer_manager.cleanup_transforms
 
-    input_transformers_post = List([],
+    input_transformers_post: List = List(
+        [],
         help="A list of string input transformers, to be applied after IPython's "
              "own input transformations."
     )
@@ -3340,6 +3342,7 b' class InteractiveShell(SingletonConfigurable):'
                 self.displayhook.exec_result = None
 
         if store_history:
+            assert self.history_manager is not None
             # Write output to the database. Does nothing unless
             # history output logging is enabled.
             self.history_manager.store_output(self.execution_count)