title: inverted comma and string in python
body: <p>I'm kinda' new to python, but I have already written many programs including some like download-managers, games and text-editors which require a lot of string manipulation.<br>
  For representing a string literal I use either single or double inverted commas.. whichever comes to my mind first at that time.</p>
  
  <p>Although I haven't yet faced any trouble. My question: is there any purpose for which python allows both or is it just for compatibility, usability etc?</p>