title: Invalid syntax on an empty line
body: <p>For some reason, I'm getting an error: </p>
  
  <pre><code>File "prode.py", line 50
  
                                                                                                          ^
  SyntaxError: invalid syntax
  </code></pre>
  
  <p>This is what my code looks like:</p>
  
  <pre><code>def start():
  #Is the user trying to get pixel or percentage data,
  if (len(sys.argv)) == 4:
      if (sys.argv[1]) == "-px":
          pct = float(sys.argv[2])
          pxl = float(sys.argv[3])
          divByCent = pct*pxl
          ans = divByCent/100
          print "%f pct of %f px = %f px" % (pct, pxl, ans)
      elif (sys.argv[1]) == "-pe":
          pxlOne = float(sys.argv[2])
          pxlTwo = float(sys.argv[3])
          divByTwo = pxlOne * 100
          ans = divByTwo / 1280
          print "%f pxl of %f pxl = %f pct" % (pxlOne, pxlTwo, ans)
  #Or something based on a ratio?
  elif (len(sys.argv) == 3):
      if (sys.argv[1] == "-use"): ratioCalc = Ratio(float(sys.argv[2]), float(sys.argv[3])
  
      #Line 50
  </code></pre>
  
  <p>Does anybody know where this is coming from?</p>