Relax type import detection for names that do not come from the ``typing`` module

Close #3191

3 files changed, 11 insertions, 5 deletions

diff --git a/ChangeLog b/ChangeLog
index 1fb8da261..e75082636 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -14,6 +14,10 @@ Release date: TBA
 
   Close #3112
 
+* Relax type import detection for names that do not come from the ``typing`` module
+
+  Close #3191
+
 
 What's New in Pylint 2.4.3?
 ===========================
diff --git a/pylint/checkers/variables.py b/pylint/checkers/variables.py
index c278bb859..e13f9b51c 100644
--- a/pylint/checkers/variables.py
+++ b/pylint/checkers/variables.py
@@ -1671,17 +1671,13 @@ class VariablesChecker(BaseChecker):
 
     def _store_type_annotation_node(self, type_annotation):
         """Given a type annotation, store all the name nodes it refers to"""
-        if (
-            isinstance(type_annotation, astroid.Name)
-            and type_annotation.name in TYPING_NAMES
-        ):
+        if isinstance(type_annotation, astroid.Name):
             self._type_annotation_names.append(type_annotation.name)
             return
 
         if not isinstance(type_annotation, astroid.Subscript):
             return
 
-        # Check if it is namespaced by typing or not.
         if (
             isinstance(type_annotation.value, astroid.Attribute)
             and isinstance(type_annotation.value.expr, astroid.Name)
diff --git a/tests/functional/u/unused_typing_imports.py b/tests/functional/u/unused_typing_imports.py
index 4c122a622..c0a2f4986 100644
--- a/tests/functional/u/unused_typing_imports.py
+++ b/tests/functional/u/unused_typing_imports.py
@@ -7,6 +7,7 @@ which means we were never processing them.
 
 import re
 import typing
+from collections import defaultdict
 from datetime import datetime
 from typing import (
     Any,
@@ -70,3 +71,8 @@ def magic(alpha, beta, gamma):
     # type: (str, Optional[str], Optional[datetime]) -> Any
     """going strong"""
     return alpha, beta, gamma
+
+
+def unused_assignment_import():
+    foo_or_bar = defaultdict(int)  # type: defaultdict
+    return foo_or_bar