Fix: Add missing cases for Is and IsNot in constant op

personal_python_ast_optimizer/parser/skipper.py

@@ -820,6 +820,10 @@ def _ast_constants_operation(  # noqa: C901, PLR0912
                 result = left_value > right_value  # type: ignore
             case ast.GtE():
                 result = left_value >= right_value  # type: ignore
+            case ast.Is():
+                result = left_value is right_value
+            case ast.IsNot():
+                result = left_value is not right_value
             case _:
                 raise ValueError(f"Invalid operation: {operation.__class__.__name__}")
 

tests/parser/test_constant_folding.py

@@ -11,6 +11,8 @@
     BeforeAndAfter("a=64|1", "a=65"),
     BeforeAndAfter("a=7&3", "a=3"),
     BeforeAndAfter("a=3^6", "a=5"),
+    BeforeAndAfter("a='a' is 'b'", "a=False"),
+    BeforeAndAfter("a='a' is not 'b'", "a=True"),
 ]
 
 

version.txt

@@ -1 +1 @@
-8.0.1
+8.0.2