Resolve "Restructure prior module"

Closes #444 (closed)

bilby/core/prior/dict.py

@@ -162,7 +162,7 @@ class PriorDict(dict):
                     module = '.'.join(cls.split('.')[:-1])
                     cls = cls.split('.')[-1]
                 else:
-                    module = __name__
+                    module = __name__.strip('.' + os.path.basename(__file__).strip('.py'))
                 cls = getattr(import_module(module), cls, cls)
                 if key.lower() in ["conversion_function", "condition_func"]:
                     setattr(self, key, cls)