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  1. Zeppelin
  2. ZEPPELIN-1318

Add support for matplotlib displaying png images in python interpreter

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.6.1, 0.7.0
    • Fix Version/s: 0.7.0
    • Component/s: python-interpreter
    • Labels:
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      Description

      The current implementation of z.show() supports matplotlib plotting svg images inline. However with some type of plots in matplotlib, particularly for maps via basemap, this causes the UI in the notebook to severely lag when the output isn't hidden. Saving the images in .png format solves this problem, but a different implementation is required in order to plot the image inline. I have proposed a solution below where the image is saved into a byte array and then displayed directly via html:

      import cStringIO
      import base64
      def show(p):
          img = cStringIO.StringIO()
          p.savefig(img, format='png')
          imgStr = "data:image/png;base64,"
          imgStr += base64.b64encode(img.getvalue().strip())
          print "%html <img src='" + imgStr + "'>" 
      

      I will incorporate this into zeppelin's z.show() function.

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              • Assignee:
                agoodman Alex Goodman
                Reporter:
                agoodman Alex Goodman
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                • Created:
                  Updated:
                  Resolved: