class_docstr: Class to execute plotting files, and extract the mpl and mpld3 figures.
class_docstr_tok: ["Class","to","execute","plotting","files",",","and","extract","the","mpl","and","mpld3","figures","."]
code: def iter_png(self):
      for fig in self.figlist:
          fig_png = self.pngfmt.format(fig.number)
          fig.savefig(fig_png)
          yield fig_png
  
imports: import os
  import glob
  import sys
  import gc
  import traceback
  import itertools
  import json
  import contextlib
  import matplotlib
  import matplotlib.pyplot
  import mpld3
  from mpld3 import urls
  from mpld3._display import NumpyEncoder
  from mpld3.mpld3renderer import MPLD3Renderer
  from mpld3.mplexporter import Exporter
label_desc: Use image node_id 3 for calling the ExecFile obj's underlying member method code with example usage: obj.iter_png() without return types