code: def __init__(self, sigma, alpha=0.3, color=(0, 0, 0), offsets=(0, 0)):
      self.gauss_filter = GaussianFilter(sigma, alpha, color)
      self.offset_filter = OffsetFilter(offsets)
  
imports: import matplotlib.pyplot
  import numpy
  from matplotlib.artist import Artist
  import matplotlib.cm
  from matplotlib.colors import LightSource
  import matplotlib.transforms
label_desc: Use image node_id 1 to create a new DropShadowFilter object from inherited base classes: BaseFilter with example: obj = DropShadowFilter(sigma, alpha, color, offsets)