text: Title: initialize_all_variables is deprecated
  Body: for the code  of tf14 and tf15 
  
  WARNING:tensorflow:From full_code.py:62 in <module>.: initialize_all_variables (from tensorflow.python.ops.variables) is deprecated and will be removed after 2017-03-02.
  Instructions for updating:
  Use `tf.global_variables_initializer` instead.