Added usage example for tf.keras.callbacks.TensorBoard
diff --git a/tensorflow/python/keras/callbacks.py b/tensorflow/python/keras/callbacks.py
index 1239ab4..a5f8a9e 100644
--- a/tensorflow/python/keras/callbacks.py
+++ b/tensorflow/python/keras/callbacks.py
@@ -1460,6 +1460,11 @@
   You can find more information about TensorBoard
   [here](https://www.tensorflow.org/get_started/summaries_and_tensorboard).
 
+  Example:
+  >>>tensorboard_callback = tf.keras.callbacks.TensorBoard(log_dir="./logs")
+  >>>model.fit(x_train, y_train, epochs=2, callbacks=[tensorboard_callback])
+  >>>#run the tensorboard command to view the visualizations
+
   Arguments:
       log_dir: the path of the directory where to save the log files to be
         parsed by TensorBoard.