title: How do I calculate percentiles with python/numpy?
body: <p>Is there a convenient way to calculate percentiles for a sequence or single-dimensional numpy array?</p>
  
  <p>I am looking for something similar to Excel's percentile function.</p>
  
  <p>I looked in NumPy's statistics reference, and couldn't find this. All I could find is the median (50th percentile), but not something more specific.</p>