chrishkchris edited a comment on issue #468: Distributted module URL: https://github.com/apache/incubator-singa/pull/468#issuecomment-528186487 Therefore, I suggest we may change the input shape assertion of the ADD function in this way: if the input shapes of the two operands are the same, it also passes the assertion: ```python assert( (len(self.shape0) <= 2 and len(self.shape1) <= 2) or (len(self.shape0) == len(self.shape1)) ) ` If this amendment is okay, I will add this change into this PR
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