title: How to define a fix sequence of MNIST training images with TensorFlow?
body: <p>I try to train a model with TensorFlow and the MNIST dataset from the TensorFlow examples. That works fine.
  But everytime i start my python script which run the model training there is a different order (sequence) of the training images.
  How can i define that the sequence of training images is everytime the same, when i start my python script?</p>