fix type

Signed-off-by: Xin Yao <[email protected]>

transformer_engine/pytorch/cpp_extensions/gemm.py

@@ -404,7 +404,7 @@ def fp8_grouped_gemm(
     use_bias: bool = False,
     use_split_accumulator: bool = False,
     D_dtype: Optional[tex.DType] = None,
-) -> Tuple[Union[List[torch.Tensor], None], ...]:
+) -> Tuple[Union[List[torch.Tensor], torch.Tensor, None], ...]:
     """
     TN layout Grouped GEMM with fp8 inputs.
     This function accepts two combinations of inputs:
@@ -416,7 +416,7 @@ def fp8_grouped_gemm(
     if isinstance(A_scale_inv, list):
         assert isinstance(out, torch.Tensor) and m_splits is not None
     elif isinstance(A_scale_inv, torch.Tensor):
-        assert isinstance(out, list)
+        assert isinstance(out, (list, tuple))
     else:
         raise ValueError("A_scale_inv should be a list of tensors or a single tensor.")
 
@@ -436,7 +436,7 @@ def fp8_grouped_gemm(
     bias_dtype = TE_DType[bias_dtype]
     gelu_input = empty_tensors
 
-    if isinstance(out, list):
+    if not isinstance(out, torch.Tensor):
         if gelu:
             gelu_input = [
                 torch.empty_like(o, dtype=bias_dtype, memory_format=torch.contiguous_format)