Fuzzy matching to associate classes with URLs

sphinx/ext/inheritance_diagram.py

@@ -33,6 +33,7 @@ class E(B): pass
 import pathlib
 import re
 from importlib import import_module
+from operator import itemgetter
 from typing import Any, Dict, Iterable, List, Optional, Tuple, cast
 
 from docutils import nodes
@@ -299,9 +300,15 @@ def generate_dot(self, name: str, urls: Dict[str, str] = {},
         for name, fullname, bases, tooltip in sorted(self.class_info):
             # Write the node
             this_node_attrs = n_attrs.copy()
-            if fullname in urls:
-                this_node_attrs['URL'] = '"%s"' % urls[fullname]
-                this_node_attrs['target'] = '"_top"'
+
+            # Fuzzy matching in case the reference is at a different level of the namespace
+            fullname_ends = itemgetter(0, -1)(fullname.split('.'))
+            for refname, url in urls.items():
+                if itemgetter(0, -1)(refname.split('.')) == fullname_ends:
+                    this_node_attrs['URL'] = '"%s"' % url
+                    this_node_attrs['target'] = '"_top"'
+                    break
+
             if tooltip:
                 this_node_attrs['tooltip'] = tooltip
             res.append('  "%s" [%s];\n' %