diff --git a/python/needle/ops/ops_mathematic.py b/python/needle/ops/ops_mathematic.py
index f78e024..7521a83 100755
--- a/python/needle/ops/ops_mathematic.py
+++ b/python/needle/ops/ops_mathematic.py
@@ -328,7 +328,7 @@ def __init__(self, axis: int):
         """
         self.axis = axis
 
-    def compute(self, args: TensorTuple) -> Tensor:
+    def compute(self, args):
         ### BEGIN YOUR SOLUTION
         raise NotImplementedError()
         ### END YOUR SOLUTION