Update python/podio/pythonizations/__init__.py

Co-authored-by: Juan Miguel Carceller <22276694+jmcarcell@users.noreply.github.com>

python/podio/pythonizations/__init__.py

@@ -7,8 +7,7 @@
 
 def load_pythonizations(namespace):
     """Register all available pythonizations for a given namespace"""
-    module_names = [name for _, name, _ in walk_packages(__path__)]
-    module_names = filter(lambda x: not x.startswith("test_"), module_names)
+    module_names = [name for _, name, _ in walk_packages(__path__) if not name.startswith("test_")]
     for module_name in module_names:
         import_module(__name__ + "." + module_name)
     pythonizers = sorted(Pythonizer.__subclasses__(), key=lambda x: x.priority())