cleaner type name format

Author: danplischke

src/sqlacodegen/generators.py

@@ -1255,10 +1255,8 @@ def render_python_type(column_type: TypeEngine[Any]) -> str:
                     self.add_import(Any)
                     python_type = Any
 
-            python_type_name = (
-                python_type.__name__
-                if hasattr(python_type, "__name__")
-                else python_type._name
+            python_type_name = cast(
+                str, getattr(python_type, "__name__", python_type._name)
             )
             python_type_module = python_type.__module__
             if python_type_module == "builtins":