Misc type stuff (#1888)

3 files changed, 11 insertions, 4 deletions

diff --git a/astroid/brain/brain_builtin_inference.py b/astroid/brain/brain_builtin_inference.py
index a872b38c..61c0baa6 100644
--- a/astroid/brain/brain_builtin_inference.py
+++ b/astroid/brain/brain_builtin_inference.py
@@ -164,7 +164,7 @@ def _builtin_filter_predicate(node, builtin_name) -> bool:
     return False
 
 
-def register_builtin_transform(transform, builtin_name):
+def register_builtin_transform(transform, builtin_name) -> None:
     """Register a new transform function for the given *builtin_name*.
 
     The transform function must accept two parameters, a node and
diff --git a/astroid/brain/brain_uuid.py b/astroid/brain/brain_uuid.py
index f6ba8883..4890e101 100644
--- a/astroid/brain/brain_uuid.py
+++ b/astroid/brain/brain_uuid.py
@@ -8,7 +8,7 @@ from astroid.nodes.node_classes import Const
 from astroid.nodes.scoped_nodes import ClassDef
 
 
-def _patch_uuid_class(node):
+def _patch_uuid_class(node: ClassDef) -> None:
     # The .int member is patched using __dict__
     node.locals["int"] = [Const(0, parent=node)]
 
diff --git a/astroid/brain/helpers.py b/astroid/brain/helpers.py
index d74f5950..56683c8e 100644
--- a/astroid/brain/helpers.py
+++ b/astroid/brain/helpers.py
@@ -2,11 +2,18 @@
 # For details: https://github.com/PyCQA/astroid/blob/main/LICENSE
 # Copyright (c) https://github.com/PyCQA/astroid/blob/main/CONTRIBUTORS.txt
 
+from __future__ import annotations
+
+from collections.abc import Callable
+
+from astroid.manager import AstroidManager
 from astroid.nodes.scoped_nodes import Module
 
 
-def register_module_extender(manager, module_name, get_extension_mod):
-    def transform(node):
+def register_module_extender(
+    manager: AstroidManager, module_name: str, get_extension_mod: Callable[[], Module]
+) -> None:
+    def transform(node: Module) -> None:
         extension_module = get_extension_mod()
         for name, objs in extension_module.locals.items():
             node.locals[name] = objs