title: Receiving 'error multiple values for index' in a simple DataFrame
body: <p>I have several lists that I'm trying to enter into a data frame:</p>
  
  <pre><code>    mydates = [0, 6, 15, 21, 30, 37, 45, 53]
      prices = [30.4, 32.5, 31.7, 31.2, 32.7, 34.1, 35.8, 37.8]
      mylist = [6.907894736842111, -2.461538461538464, -1.5772870662460567,4.807692307692319,
      4.2813455657492305, 4.985337243401747, 5.5865921787709505, -3.9682539682539684]
  </code></pre>
  
  <p>I enter</p>
  
  <pre><code>    df = DataFrame(prices, mylist, index=mydates, columns=['Prices', 'Percentage
      s']) 
  </code></pre>
  
  <p>And receive this error:</p>
  
  <pre><code>    Traceback (most recent call last):
        File "&lt;input&gt;", line 1, in &lt;module&gt;
      TypeError: __init__() got multiple values for keyword argument 'index'
  </code></pre>
  
  <p>While if I enter this everything works fine.</p>
  
  <pre><code>    df = DataFrame(prices, index=mydates, columns=['Prices'])
  </code></pre>
  
  <p>Could someone please tell me how to fix what's wrong? .</p>