class tf.errors.PermissionDeniedError Raised when the caller does not have permission to run an operation. For

tf.Session.as_default() Returns a context manager that makes this object the default session. Use

class tf.errors.AlreadyExistsError Raised when an entity that we attempted to create already exists. For

tf.OpError.op The operation that failed, if known. N.B. If the failed op was synthesized

tf.errors.FailedPreconditionError.__init__(node_def, op, message) Creates a FailedPreconditionError.

class tf.errors.CancelledError Raised when an operation or step is cancelled. For example, a long-running

tf.errors.OutOfRangeError.__init__(node_def, op, message) Creates an OutOfRangeError.

class tf.errors.InternalError Raised when the system experiences an internal error. This exception

tf.Session.__init__(target='', graph=None, config=None) Creates a new TensorFlow session. If no

tf.Session.run(fetches, feed_dict=None, options=None, run_metadata=None) Runs operations and evaluates tensors in fetches