title: unique values between 2 lists
body: <p>I am trying to find unique values b/w 2 lists but this logic doesn't seems to work</p>
  
  <pre><code>x = [1,2,3,4]
  f = [1,11,22,33,44,3,4]
  for element in f:
      if element in x:
          f.remove(element)
  print f
  </code></pre>
  
  <p>desired output</p>
  
  <pre><code>[11, 22, 33, 44]
  </code></pre>
  
  <p>actual output</p>
  
  <pre><code>[11, 22, 33, 44, 4]
  </code></pre>
  
  <p><a href="https://stackoverflow.com/questions/28444561/get-only-unique-elements-from-two-lists-python">Get only unique elements from two lists python</a></p>
  
  <p>same ask here
  solution: </p>
  
  <pre><code>x = [1,2,3,4]
  f = [1,11,22,33,44,3,4]
  
  res = list(set(x+f))
  print(res)
  [1, 2, 3, 4, 33, 11, 44, 22]
  </code></pre>
  
  <p>as you can see its adding 1,2,3,4 not output I need</p>