title: Creating a common dictionary in python taking key value pairs from multiple pair of lists
body: <p>How can I create a big dictionary in Python taking key value pairs from multiple pair of lists. For example, we have 6 lists, namely <em>key1,val1,key2,val2 and key3,val3</em>. Now I want to create a dictionary containing <strong>all keys from key1, key2 and key3</strong> and <strong>corresponding values from val1, val2, val3</strong> respectively.
  for example:</p>
  
  <pre><code>val1 = ['3/12/2017', '12/18/2017', '12/18/2017', '12/12/2017']
  key1 = [32, 45, 107, 150]
  val2 = ['2000-03-13', '2014-11-31']
  key2 = [166, 244]
  </code></pre>
  
  <p>I want the dictionary as given below:</p>
  
  <pre><code>big_dict = {32: '3/12/2017', 107: '12/18/2017', 45: '12/18/2017', 150: '12/12/2017', 244: '2014-11-31', 166: '2000-03-13'}
  </code></pre>
  
  <p>How can this be done?
  Thanks</p>