title: Python interpolation and extracting value of z for x and y?
body: <p>Would you please help
  I have this data where z is a function for specific x and y</p>
  
  <pre><code>xs = [0.15, 0.35, 0.5, 0.67, 0.8]
  ys = [0.01,0.01, 0.01, 0.01, 0.01]
  z = [0.75, 0.83, 1.00, 0.92, 0.91]
  </code></pre>
  
  <p>I arranged the values in this shape
  How can I do interpolation for the points so I can call z value later different than the the one I have?</p>