A placeholder op for a value that will be fed into the computation.

N.B. This operation will fail with an error if it is executed. It is intended as a way to represent a value that will always be fed, and to provide attrs that enable the fed value to be checked at runtime.

dtype A tf.DType. The type of elements in the tensor.
shape An optional tf.TensorShape or list of ints. Defaults to None. (Optional) The shape of the tensor. If the shape has 0 dimensions, the shape is unconstrained.
name A name for the operation (optional).

A Tensor of type dtype.