allow_pickle=True in np.load

tfields/core.py

@@ -359,7 +359,9 @@ class AbstractNdarray(np.ndarray):
         Factory method
         Given a path to a npz file, construct the object
         """
-        np_file = np.load(path, **load_kwargs)
+        # TODO: think about allow_pickle, wheter it really should be True or
+        # wheter we could avoid pickling
+        np_file = np.load(path, allow_pickle=True, **load_kwargs)
         return cls._from_dict(**np_file)
 
     def _as_dict(self):