code: def plotly_history_graph():
      cli = tw.WatcherClient()
      p = tw.plotly.line_plot.LinePlot(title="Demo")
      s2 = cli.create_stream(
          event_name="ev_j", expr="map(lambda v:(v.x, v.val), l)"
      )
      p.subscribe(s2, ytitle="ev_j", history_len=15)
      p.show()
      utils.wait_key()
  
file_path: tensorwatch/test/simple_log/cli_ij.py
imports: import tensorwatch
  import time
  import math
  from tensorwatch import utils
label_desc: Use image node_id 5 for calling a global function with example usage: plotly_history_graph() without return types