title: [python][selenium] on-screen position of element
body: <p>I would like to know the on-screen position of some element. I know how to get the position of an element in Python Selenium webriver but how to get an offset from the left-top corner of the screen?</p>
  <p><img src="https://i.stack.imgur.com/wEgBa.png" alt="image" /></p>