fix azure service bus isinstance check (#2053)

celery · Jul 10, 2024 · 52d8b7f · 52d8b7f
1 parent 183c873
commit 52d8b7f
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/kombu/transport/azureservicebus.py b/kombu/transport/azureservicebus.py
@@ -141,8 +141,13 @@ def _try_parse_connection_string(self) -> None:
         self._namespace, self._credential = Transport.parse_uri(
             self.conninfo.hostname)
 
-        if (isinstance(self._credential, DefaultAzureCredential) or
-                isinstance(self._credential, ManagedIdentityCredential)):
+        if (
+            DefaultAzureCredential is not None
+            and isinstance(self._credential, DefaultAzureCredential)
+        ) or (
+            ManagedIdentityCredential is not None
+            and isinstance(self._credential, ManagedIdentityCredential)
+        ):
             return None
 
         if ":" in self._credential: