code: def show():
      import matplotlib.pyplot as plt, Image
  
      plt.savefig("cg_rosenbrock_out", dpi=72)
      im = Image.open("cg_rosenbrock_out.png")
      im.show()
      return
  
file_path: mystic/examples/cg_rosenbrock.py
imports: import matplotlib.pyplot
  from test_rosenbrock import *
  from numpy import log
  from mystic._scipyoptimize import fmin_cg
  import numpy
  from mystic.tools import getch
label_desc: Use image node_id 1 for calling a global function with example usage: show() without return types