Pyreverse - Show class has-a relationships inferred from type-hints

Author: mbyrnepr2

ChangeLog

@@ -14,6 +14,10 @@ What's New in Pylint 2.9.6?
 ===========================
 Release date: TBA
 
+* pyreverse: Show class has-a relationships inferred from the type-hint
+
+Closes #4744
+
 ..
   Put bug fixes that should not wait for a new minor version here
 

doc/whatsnew/2.10.rst

@@ -17,4 +17,6 @@ New checkers
 Other Changes
 =============
 
+* Pyreverse - Show class has-a relationships inferred from type-hints
+
 * Added ``time.clock`` to deprecated functions/methods for python 3.3

pylint/pyreverse/utils.py

@@ -269,9 +269,9 @@ def infer_node(node: Union[astroid.AssignAttr, astroid.AssignName]) -> set:
     otherwise return a set of the inferred types using the NodeNG.infer method"""
 
     ann = get_annotation(node)
-    if ann:
-        return {ann}
     try:
+        if ann:
+            return set(ann.infer())
         return set(node.infer())
     except astroid.InferenceError:
-        return set()
+        return {ann} if ann else set()