Update loss.py

python/paddle/nn/functional/loss.py

@@ -1812,10 +1812,11 @@ def cross_entropy(input,
             valid_label = paddle.where(
                 label == ignore_index,
                 paddle.zeros(
-		    [1], dtype=label.dtype),
-	    	label)
+		            [1], dtype=label.dtype),
+	    	    label)
             if (paddle.numel(paddle.nonzero(valid_label < 0)) > 0) or (
-                    paddle.numel(paddle.nonzero(valid_label >= input.shape[-1])) > 0):
+                    paddle.numel(
+						paddle.nonzero(valid_label >= input.shape[-1])) > 0):
                 invalid_label = paddle.gather_nd(
                     input, paddle.nonzero(valid_label < 0))
                 if paddle.numel(invalid_label) > 0: