title: Can I use += on multiple variables on one line?
body: <p>While shortening my code I was cutting down a few variable declarations onto one line-</p>
  
  <pre><code>##For example- going from-
  Var1 =15
  Var2 = 26
  Var3 = 922
  
  ##To-
  Var1, Var2, Var3 = 15, 26, 922
  </code></pre>
  
  <p>However, when I tried doing the same thing to this code-</p>
  
  <pre><code>User_Input += Master_Key[Input_ref]
  Key += Master_Key[Key_ref]
  Key2 += Master_Key[Key_2_Ref]
  
  ##Which looks like-
  User_Input, Key, Key2 += Master_Key[Input_Ref], Master_Key[Key_Ref], Master_Key[Key_2_Ref]
  </code></pre>
  
  <p>This throws the error</p>
  
  <pre><code>SyntaxError: illegal expression for augmented assignment
  </code></pre>
  
  <p>I have read the <a href="https://docs.python.org/2/reference/simple_stmts.html" rel="noreferrer">relevant Python documentation</a>, but I still can't find a way to shorten this particular bit of code.</p>