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Changing the plot backend should fix this.

  import matplotlib
  matplotlib.use('Agg')
  import matplotlib.pyplot as plt
https://stackoverflow.com/questions/2801882/generating-a-png...


I believe Agg is only for bitmap output. While there are probably backends that work with a headless system, I find the OO option much more flexible.


Agg works for all outputs. I use it in combination with OO over ssh all the time.




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