title: Syntax Error that I can't find
body: <p>I'm pulling my hairs here...</p>
  
  <pre><code>import os
  import random
  MAC = (0,0,":",0,0,":")
  chars = ('0','1','2','3','4','5','6','7','8','9','a','b','c','d','e')
  a = 5
  while (a &lt;= 17):
    if a == 6 | a == 9 | a == 12 | a == 15:
      MAC.append(":")
    else:
      MAC.append(chars(random.randomint(0,15))
  
    a += 1
  print MAC
  </code></pre>
  
  <p>What am I doing wrong?! The indentation is correct, just as the example shows. Any help is welcomed.
  <strong>EDIT:</strong> OH CRAP, forgot to show what the error is..</p>
  
  <blockquote>
    <p>File "macchanger.py", line 12
        a += 1
        ^ SyntaxError: invalid syntax</p>
  </blockquote>