code: def main():
      parser = argparse.ArgumentParser("lowpass.py")
      parser.add_argument("-d", "--device", default="cpu")
      parser.add_argument("--fft", action="store_true", default=None)
      parser.add_argument("--no_fft", action="store_false", dest="fft")
      parser.add_argument("--zeros", default=8, type=float)
      args = parser.parse_args()
  
      table = MarkdownTable(
          [
              "Freq.",
              "Attn. 0.9 (dB)",
              "Attn 1.0 (dB)",
              "Attn 1.1 (dB)",
              "Time (ms)",
          ]
      )
      table.header()
      for freq in [0.005, 0.01, 0.1, 0.2, 0.4]:
          test(
              table,
              freq,
              zeros=args.zeros,
              fft=args.fft,
              device=args.device,
          )
  
imports: import argparse
  from julius import lowpass_filter
  from julius.core import pure_tone, volume
  from julius.utils import Chrono, MarkdownTable
label_desc: Use image node_id 2 for calling a global function with example usage: main() without return types