# Running Graphs
[TOC]

This library contains classes for launching graphs and executing operations.

@{$programmers_guide/low_level_intro$This guide} has examples of how a graph
is launched in a @{tf.Session}.

## Session management

*   @{tf.Session}
*   @{tf.InteractiveSession}
*   @{tf.get_default_session}

## Error classes and convenience functions

*   @{tf.OpError}
*   @{tf.errors.CancelledError}
*   @{tf.errors.UnknownError}
*   @{tf.errors.InvalidArgumentError}
*   @{tf.errors.DeadlineExceededError}
*   @{tf.errors.NotFoundError}
*   @{tf.errors.AlreadyExistsError}
*   @{tf.errors.PermissionDeniedError}
*   @{tf.errors.UnauthenticatedError}
*   @{tf.errors.ResourceExhaustedError}
*   @{tf.errors.FailedPreconditionError}
*   @{tf.errors.AbortedError}
*   @{tf.errors.OutOfRangeError}
*   @{tf.errors.UnimplementedError}
*   @{tf.errors.InternalError}
*   @{tf.errors.UnavailableError}
*   @{tf.errors.DataLossError}
*   @{tf.errors.exception_type_from_error_code}
*   @{tf.errors.error_code_from_exception_type}
*   @{tf.errors.raise_exception_on_not_ok_status}
