code: def show_mpl():
      cli = tw.WatcherClient(r"c:\temp\sum.log")
      s1 = cli.open_stream("sum")
      p = tw.LinePlot(title="Demo")
      p.subscribe(s1, xtitle="Index", ytitle="sqrt(ev_i)")
      s1.load()
      p.show()
  
      tw.plt_loop()
  
imports: import tensorwatch
  from tensorwatch import utils
label_desc: Use image node_id 1 for calling a global function with example usage: show_mpl() without return types