title: Converting a list to dictionary in python
body: <p>I've gone through many questions but couldn't find what i was looking for.
  I have a list something like this:
      <code>[2, 3, 5, 7, 11]</code><br>
  and I want to convert it into a dictionary in the format:
  i.e. the values of the list should be keys and each associated value should be zero.
      <code>{2:0 , 3:0 , 5:0 , 7:0 , 11:0}</code>  </p>