rt
使用keras中的model.fit函数进行训练时出现错误：ValueError: None values not supported.
错误信息如下：
File "C:/Users/Desktop/MNISTpractice/mnist.py", line 93, in <module>
model.fit(x_train,y_train, epochs=2, callbacks=callback_list,validation_data=(x_val,y_val))
File "C:\Anaconda3\lib\site-packages\keras\engine\training.py", line 1575, in fit
self._make_train_function()
File "C:\Anaconda3\lib\site-packages\keras\engine\training.py", line 960, in _make_train_function
loss=self.total_loss)
File "C:\Anaconda3\lib\site-packages\keras\legacy\interfaces.py", line 87, in wrapper
return func(*args, **kwargs)
File "C:\Anaconda3\lib\site-packages\keras\optimizers.py", line 432, in get_updates
m_t = (self.beta_1 * m) + (1. - self.beta_1) * g
File "C:\Anaconda3\lib\site-packages\tensorflow\python\ops\math_ops.py", line 820, in binary_op_wrapper
y = ops.convert_to_tensor(y, dtype=x.dtype.base_dtype, name="y")
File "C:\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.py", line 639, in convert_to_tensor
as_ref=False)
File "C:\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.py", line 704, in internal_convert_to_tensor
ret = conversion_func(value, dtype=dtype, name=name, as_ref=as_ref)
File "C:\Anaconda3\lib\site-packages\tensorflow\python\framework\constant_op.py", line 113, in _constant_tensor_conversion_function
return constant(v, dtype=dtype, name=name)
File "C:\Anaconda3\lib\site-packages\tensorflow\python\framework\constant_op.py", line 102, in constant
tensor_util.make_tensor_proto(value, dtype=dtype, shape=shape, verify_shape=verify_shape))
File "C:\Anaconda3\lib\site-packages\tensorflow\python\framework\tensor_util.py", line 360, in make_tensor_proto
raise ValueError("None values not supported.")
ValueError: None values not supported.
