title: ValueError: too many values to unpack
body: <p>why this code is wrong?</p>
  
  <pre><code>for i,j in range(100),range(200,300):
      print i,j
  </code></pre>
  
  <p>when I test this for statement I see this error </p>
  
  <blockquote>
    <p>ValueError: too many values to unpack</p>
  </blockquote>
  
  <p>but when I test</p>
  
  <pre><code>for i, j in range(2),range(2):
       print i,j
  </code></pre>
  
  <p>every thing is correct!</p>