ValueError: None values not supported.

C:\Users\Learning\.conda\envs\tensorflow\python.exe D:/练习/TF5简单网络.py
Traceback (most recent call last):
  File "D:/练习/TF5简单网络.py", line 42, in <module>
    loss = tf.reduce_mean(tf.reduce_sum(tf.square(ys - prediction),
  File "C:\Users\Learning\.conda\envs\tensorflow\lib\site-packages\tensorflow\python\ops\math_ops.py", line 829, in binary_op_wrapper
    y = ops.convert_to_tensor(y, dtype=x.dtype.base_dtype, name="y")
  File "C:\Users\Learning\.conda\envs\tensorflow\lib\site-packages\tensorflow\python\framework\ops.py", line 676, in convert_to_tensor
    as_ref=False)
  File "C:\Users\Learning\.conda\envs\tensorflow\lib\site-packages\tensorflow\python\framework\ops.py", line 741, in internal_convert_to_tensor
    ret = conversion_func(value, dtype=dtype, name=name, as_ref=as_ref)
  File "C:\Users\Learning\.conda\envs\tensorflow\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:\Users\Learning\.conda\envs\tensorflow\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:\Users\Learning\.conda\envs\tensorflow\lib\site-packages\tensorflow\python\framework\tensor_util.py", line 364, in make_tensor_proto
    raise ValueError("None values not supported.")
ValueError: None values not supported.

 

进程已结束,退出代码为 1
如何解决

要把代码贴出来呀,看这个错误就是参数有问题吧,没有值,不支持。