Use for/else in custom_module_finder

__init__.py

@@ -60,14 +60,14 @@ class custom_module_finder(MetaPathFinder):
         # Skip if the package is not openram
         if package_name != "openram":
             return None
-        customizable = False
         # Search for the module name in customizable modules
         from openram import OPTS
         for k, v in OPTS.__dict__.items():
             if module_name == v:
-                customizable = True
+                break
+        else:
+            return None
         # Search for the custom module
-        if customizable:
         import sys
         # Try to find the module in sys.path
         for path in sys.path: