title: Append a variable to a list in python
body: <p>here <code>my_list</code> is a list containing string(alphabets). i have to select (no. user input) of alphabets randomly. 
  my task is to add these (no. user input) to a list and then do a little bit further operation with that list.
  my problem here is I am unable to add <code>rndm</code> to my <code>checklist</code> .</p>
  
  <p>here is m function</p>
  
  <pre><code>for i in range(0, n_subs):    
      rndm=my_list[random.randint(0, n_subs)]
      checklist.insert(rndm)
  print checklist#check
  </code></pre>