title: How to compare 2 lists are and able to list uncommon values
body: <p>I have been working on comparing 2 list and trying to list uncommon value</p>
  <p>a = ['101,102,201,202,301,305,405,500']
  b = ['101,201,202,301,405,600']</p>
  <p>I want to compare list b with list a and list uncommon values</p>
  <p>Code which i was trying as below</p>
  <p>for x in a:
  for y in b:
  if x != y:
  print x</p>