title: Checking if List contains all items from another list
body: <p>What is the easiest/fastest way to check if a list of tuples contains all the the tuples that another list does. For example:</p>
  
  <pre><code>t1 = [ (1,2), (3,4), (5,6), (7,8), (9,10), (11,12) ]
  t2 = [ (3,4), (11,12) ]
  </code></pre>
  
  <p>would be a true case since t1 contains all the tuples in t2. I tried something like:</p>
  
  <pre><code>[i for e in t2 for i in t1 if e in i]
  sorted(t1) == sorted(t2)
  </code></pre>
  
  <p>but this seemed to always return true. Is there a better way?</p>