Add confidence=INFERENCE

Author: nickdrozd

pylint/checkers/typecheck.py

@@ -1407,7 +1407,11 @@ def _check_isinstance_args(self, node: nodes.Call) -> None:
 
         second_arg = node.args[1]
         if _is_invalid_isinstance_type(second_arg):
-            self.add_message("isinstance-second-argument-not-valid-type", node=node)
+            self.add_message(
+                "isinstance-second-argument-not-valid-type",
+                node=node,
+                confidence=INFERENCE,
+            )
 
     # pylint: disable = too-many-branches, too-many-locals, too-many-statements
     def visit_call(self, node: nodes.Call) -> None:

tests/functional/i/isinstance_second_argument.txt

@@ -1,5 +1,5 @@
-isinstance-second-argument-not-valid-type:27:0:27:23::Second argument of isinstance is not a type:UNDEFINED
-isinstance-second-argument-not-valid-type:28:0:28:19::Second argument of isinstance is not a type:UNDEFINED
-isinstance-second-argument-not-valid-type:29:0:29:34::Second argument of isinstance is not a type:UNDEFINED
-isinstance-second-argument-not-valid-type:30:0:30:54::Second argument of isinstance is not a type:UNDEFINED
-isinstance-second-argument-not-valid-type:31:0:31:18::Second argument of isinstance is not a type:UNDEFINED
+isinstance-second-argument-not-valid-type:27:0:27:23::Second argument of isinstance is not a type:INFERENCE
+isinstance-second-argument-not-valid-type:28:0:28:19::Second argument of isinstance is not a type:INFERENCE
+isinstance-second-argument-not-valid-type:29:0:29:34::Second argument of isinstance is not a type:INFERENCE
+isinstance-second-argument-not-valid-type:30:0:30:54::Second argument of isinstance is not a type:INFERENCE
+isinstance-second-argument-not-valid-type:31:0:31:18::Second argument of isinstance is not a type:INFERENCE

tests/functional/i/isinstance_second_argument_py310.txt

@@ -1,3 +1,3 @@
-isinstance-second-argument-not-valid-type:15:0:15:22::Second argument of isinstance is not a type:UNDEFINED
-isinstance-second-argument-not-valid-type:16:0:16:28::Second argument of isinstance is not a type:UNDEFINED
-isinstance-second-argument-not-valid-type:18:0:18:24::Second argument of isinstance is not a type:UNDEFINED
+isinstance-second-argument-not-valid-type:15:0:15:22::Second argument of isinstance is not a type:INFERENCE
+isinstance-second-argument-not-valid-type:16:0:16:28::Second argument of isinstance is not a type:INFERENCE
+isinstance-second-argument-not-valid-type:18:0:18:24::Second argument of isinstance is not a type:INFERENCE