text: """
  Run this Python script to generate all the PNGs from the examples in this folder.
  """
  
  
  import os
  
  
  def execfile(filename):
      exec(compile(open(filename, "rb").read(), filename, 'exec'))
  
  examples = [f for f in os.listdir('.') if f.endswith(".py") and
                                         not f.startswith('_')]
  
  for f in examples:
      print ("running: "+f)
      exec("import "+f[:-3])