TensorFlow ‘module’ object has no attribute ‘global_variables_initializer’

I’m new to Tensorflow I’m running a Deep learning Assignment from Udacity on iPython notebook. link

And it has an error.

AttributeError                            Traceback (most recent call last)
`<ipython-input-18-3446420b5935>` in `<module>`()
  2 
  3 with tf.Session(graph=graph) as session:
----> 4   tf.global_variables_initializer().run()

AttributeError: 'module' object has no attribute 'global_variables_initializer'

Please help! How can I fix this? Thank you.

Answer

In older versions, it was called tf.initialize_all_variables.