class_docstr: Benchmark for pixel graph routines in scikit-image.
code: def time_build_pixel_graph(self):
      graph.pixel_graph(self.skeleton, connectivity=2)
  
imports: import numpy
  from scipy import ndimage
  from skimage import color, data, filters, graph, morphology
label_desc: Use image node_id 2 for calling the GraphSuite obj's underlying member method code with example usage: obj.time_build_pixel_graph() without return types