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matplotlib.artist.Artist.get_sketch_params
Artist.get_sketch_params()- 
    
Returns the sketch parameters for the artist.
Returns: sketch_params : tuple or
NoneA 3-tuple with the following elements:
scale: The amplitude of the wiggle perpendicular to the source line.length: The length of the wiggle along the line.randomness: The scale factor by which the length is shrunken or expanded.
May return
Noneif no sketch parameters were set. 
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 http://matplotlib.org/2.0.2/api/_as_gen/matplotlib.artist.Artist.get_sketch_params.html