[feat] update optimizer bwd; ä¸

colossalai/interface/optimizer.py

@@ -49,11 +49,11 @@ class OptimizerWrapper:
         """
         self.optim.zero_grad(*args, **kwargs)
 
-    def backward(self, loss: Tensor, *args, **kwargs):
+    def backward(self, loss: Tensor, inputs=None, retain_graph=False, **kwargs):
         """
         Performs a backward pass on the loss.
         """
-        loss.backward(*args, **kwargs)
+        loss.backward(inputs=inputs, retain_graph=retain_graph, **kwargs)
 
     def backward_by_grad(self, tensor: Tensor, grad: Tensor, inputs: Tensor = None, retain_graph: bool = False):
         """