message: Update Session.py
  The current example provided in TF website throws an error in TF2.x as we need to disable eager to build a graph and run in session.
  Please check the colab [gist here](https://colab.sandbox.google.com/gist/jvishnuvardhan/01e01bd71653f6566c68f5210fabdf65/untitled827.ipynb). Thanks!
diff: @@ -1514,6 +1514,7 @@ class Session(BaseSession):
  example:
  ```python
  + tf.compat.v1.disable_eager_execution() # need to disable eager in TF2.x
  # Build a graph.
  a = tf.constant(5.0)
  b = tf.constant(6.0)
  @@ -1523,7 +1524,7 @@ class Session(BaseSession):
  sess = tf.compat.v1.Session()
  # Evaluate the tensor `c`.
  - print(sess.run(c))
  + print(sess.run(c)) # prints 30.0
  ```
  A session may own resources, such as
  