tf.reduce_sum()

###引用自  https://blog.csdn.net/qq_16137569/article/details/72568793     distance = tf.reduce_sum(tf.abs(tf.add(xtr, tf.negative(xte))), reduction_indices=1) 该句调用tf.reduce_sum(arg1,arg2) ,参数arg1即为要求和的数据

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