Operation was rejected because the system is not in a state to execute it.
This exception is most commonly raised when running an operation
that reads a
before it has been initialized.
__init__( node_def, op, message )
The integer error code that describes the error.
The error message that describes the error.
NodeDef proto representing the op that failed.
The operation that failed, if known.
N.B. If the failed op was synthesized at runtime, e.g. a
Recv op, there will be no corresponding
object. In that case, this will return
None, and you should
instead use the
discover information about the op.
Operation that failed, or None.