title: How to convert list of `numpy.datetime64` to `matplotlib.dates`?
body: <p>Here is my simple object:</p>
  
  <pre><code>[numpy.datetime64('2017-01-03T00:00:00.000000000'),
   numpy.datetime64('2017-01-04T00:00:00.000000000'),
   numpy.datetime64('2017-01-05T00:00:00.000000000'),
   numpy.datetime64('2017-01-06T00:00:00.000000000'),
   numpy.datetime64('2017-01-09T00:00:00.000000000'),
   numpy.datetime64('2017-01-10T00:00:00.000000000'),
   numpy.datetime64('2017-01-11T00:00:00.000000000'),
   numpy.datetime64('2017-01-12T00:00:00.000000000'),
   numpy.datetime64('2017-01-13T00:00:00.000000000'),
   numpy.datetime64('2017-01-16T00:00:00.000000000'),
   numpy.datetime64('2017-01-17T00:00:00.000000000'),
   numpy.datetime64('2017-01-18T00:00:00.000000000'),
   numpy.datetime64('2017-01-19T00:00:00.000000000'),
   numpy.datetime64('2017-01-20T00:00:00.000000000'),
   numpy.datetime64('2017-01-23T00:00:00.000000000'),
   numpy.datetime64('2017-01-24T00:00:00.000000000'),
   numpy.datetime64('2017-01-25T00:00:00.000000000'),
   numpy.datetime64('2017-01-26T00:00:00.000000000'),
   numpy.datetime64('2017-01-27T00:00:00.000000000'),
   numpy.datetime64('2017-02-01T00:00:00.000000000')]
  </code></pre>
  
  <p>instead of using a loop an empty list convert one by one, is there any shortcuts for that? Thanks. </p>