title: Merge three lists together so that each nth item corresponds to the other lists' nth item
body: <p>I have three lists. I need to make a master list so that. </p>
  
  <pre><code>l_site = [www.example.com, www.example.com] 
  l_overall = [3.5, 4.5]
  l_workload= [4.5, 6.5]
  master_list= {[www.example.com, 3.5, 4.5], [www.example.com, 4.5, 6.5]
  </code></pre>
  
  <p>All lists are of the same length. I need this <code>master_list</code> so that I can reference it later.</p>
  
  <pre><code>def make_master_list(site, overall, workload):
  # connect three values with eachother in a list
  
  master_list= {[www.example.com, 3.5, 4.5], [www.example.com, 4.5, 6.5]
  </code></pre>