fix bug

8 years ago · be218bfac4
parent 33cb12a89b
commit be218bfac4
1 changed files with 1 additions and 1 deletions
--- a/python/paddle/v2/fluid/backward.py
+++ b/python/paddle/v2/fluid/backward.py
@ -192,7 +192,7 @@ def _append_backward_ops_(target,
    """
    if callback is None:
-        def empty_callback(block):
+        def empty_callback(block, context):
            pass
        callback = empty_callback