tensorflow的错误之Can not convert a float32 into a Tensor or Operation

_,train_loss,acc=self.sess.run([train_op,total_losses,acc],feed_dict=feed_dict)TypeError: Fetch argument 0.546875 has invalid type <class 'numpy.float32'>, must be a string or Tensor. (Can not convert a float32 into a Tensor or Operation.)

为什么呢，因为一个等式中的acc重名了；第一次运行后等式右边的acc变成了一个整数；如下所示：

_,train_loss,acc=self.sess.run([train_op,total_losses,acc],feed_dict=feed_dict)

所以才会出现上述错误

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