title: Python one-liner if else statement
body: <p>This problem is taken from codingbat. Given two int values, return their sum. Unless the two values are the same, then return double their sum.</p>
  
  <p>I'm trying to solve it in one line:</p>
  
  <pre><code>def sum_double(a, b):
      return 2*(a+b) if (a == b) else return a+b
  </code></pre>
  
  <p>But I'm getting an error and I'm not sure why. Would appreciate any help.</p>