title: randomized data trasnformation in pytorch
body: <p>I want to rotate all the images in my <code>Dataset</code> with a random degree between <code>[0,180]</code>. If I compose a transformation function and pass my images to this function in the <code>__getitem__</code> function of my <code>Dataset</code> class. Does this mean:</p>
  <ol>
  <li>every single image is randomly rotated?</li>
  <li>images in each batch get rotated with an identical degree but this degree randomly changes across batches (calls)?</li>
  </ol>
  <p>I would appreciate it if you could clarify this for me.</p>