class_docstr: Execute the file and store the output, docstring, and
  sequence of matplotlib figures
code: def flush(self):
      if self.print_output:
          self.stdout.flush()
  
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 ExecFile obj's underlying member method code with example usage: obj.flush() without return types