class_docstr: Example Builder for sphinx documentation
code: def image_filename(self, example_path):
      filename, ext = os.path.splitext(example_path)
      filename += "_%s"
      return os.path.join(self.image_dir, filename + ".png")
  
imports: import sys
  import os
  import traceback
  import token
  import tokenize
  import gc
  import shutil
  import glob
  import warnings
  import matplotlib
  from matplotlib import image
  from matplotlib import pyplot
label_desc: Use image node_id 4 for calling the ExampleBuilder obj's underlying member method code with example usage: obj.image_filename(example_path) and returns: os