code: def show_find_lr():
      cli_train = tw.WatcherClient()
      plot = tw.LinePlot()
  
      train_batch_loss = cli_train.create_stream(
          event_name="batch",
          expr="lambda d:(d.tt.scheduler.get_lr()[0], d.metrics.batch_loss)",
      )
      plot.subscribe(train_batch_loss, xtitle="Epoch", ytitle="Loss")
  
      utils.wait_key()
  
file_path: tensorwatch/test/mnist/cli_mnist.py
imports: import tensorwatch
  import time
  import math
  from tensorwatch import utils
label_desc: Use image node_id 2 for calling a global function with example usage: show_find_lr() without return types