title: How to locate tuples in a pandas dataframe
body: <p>I apologize if this has been asked but I can't quite find it anywhere.
  I have a pandas dataframe that contains color tuples, I want to find all rows that contain a certain tuple, but when I try to search for a tuple it instead searches for columns or something? I'm attaching a picture of a notebook example of what I mean</p>
  
  <p><a href="http://i.stack.imgur.com/J460v.png" rel="nofollow">http://i.stack.imgur.com/J460v.png</a></p>