title: ValueError: too many values to unpack Scipy
body: <p>I'm a beginner and I'm trying to use regression from scipy.  I'm getting the error:</p>
  
  <p>ValueError: too many values to unpack</p>
  
  <p>when I run the following code:</p>
  
  <pre><code>testArray1 = [1,2,3] 
  testArray2 = [2,3,4] 
  slope, intercept, r_value, std_err = scipy.stats.linregress(testArray1,testArray2)
  </code></pre>