add error message

apache · Oct 31, 2019 · 2094a36 · 2094a36
1 parent 82dca7b
commit 2094a36
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/python/mxnet/numpy/multiarray.py b/python/mxnet/numpy/multiarray.py
@@ -1996,7 +1996,8 @@ def array(object, dtype=None, ctx=None):
     if isinstance(object, (ndarray, _np.ndarray)):
         dtype = object.dtype if dtype is None else dtype
     elif isinstance(object, NDArray):
-        raise ValueError("")
+        raise ValueError("If you're trying to create a mxnet.numpy.ndarray "
+                         "from mx.nd.NDArray, please use the zero-copy as_np_ndarray function.")
     else:
         if dtype is None:
             dtype = object.dtype if hasattr(object, "dtype") else _np.float32