Puzzled about the attention part

[JustinLin610]

m_C = tf.reduce_sum(m_emb_C * self._encoding, 2)
c_temp = tf.transpose(m_C, [0, 2, 1])

Here in this part, the first line with reduce_sum should turn the matrix into 2-dimension, so I think it won't work for the transposition in the second line. I am not sure if I am getting something wrong

[kodakfu]

• shape[m_emb_C]=(?,10,7,20)

• shape[self._encoding]=(7 ,20)

• shape(m_emb_C * self._encoding)=(?,10,7,20)

• shape(m_C )= (?,10,20)

• shape(c_temp)= (?,20,10)