title: Create a basic Python interface to save images drawn with a mouse
body: <p>I am working on the following project and I am having really difficulties in finding the right way of doing that. I would like to build in Python (but I am open to other possibilities) a very basic interface that allows the user to draw with the mouse (or the pen if used on a surface laptop) something and then save the image. Ideally I would like this to work on a website or at least in a jupyter notebook (at least I imagine this to be utterly difficult).</p>
  
  <p>Anyone can point me in the right direction? The goal would be to use the images as input to a neural network model to demonstrate its result with real life examples.</p>
  
  <p>I am looking at tk but I don't seem to find much in terms of examples.</p>
  
  <p>Thanks in advance, Umberto</p>