code: def main(argv):
      if len(argv) > 1:
          raise app.UsageError("Too many command-line arguments.")
  
      # Define a program which describes the topology of communicating nodes and
      # edges. In more involved examples, several programs can be defined and
      # launched at once.
      program = make_program(num_producers=_NUM_PRODUCERS.value)
  
      # Note that at launch time, none of the producers has been instantiated.
      # Producers are instantiated only at runtime.
      lp.launch(program)
  
imports: from absl import app
  from absl import flags
  import launchpad
  from launchpad.examples.consumer_producers.program import make_program
label_desc: Use image node_id 1 for calling a global function with example usage: main(argv) without return types