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

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

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.

tf.InteractiveSession.close() Closes an InteractiveSession.

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

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

tf.Session.__enter__()