code: def parse_args(pargs=None):
      parser = argparse.ArgumentParser(
          formatter_class=argparse.ArgumentDefaultsHelpFormatter,
          description="Fake Indicator",
      )
  
      parser.add_argument(
          "--data",
          "-d",
          default="../../datas/2005-2006-day-001.txt",
          help="data to add to the system",
      )
  
      parser.add_argument(
          "--fromdate",
          "-f",
          default=None,
          help="Starting date in YYYY-MM-DD format",
      )
  
      parser.add_argument(
          "--todate",
          "-t",
          default=None,
          help="Starting date in YYYY-MM-DD format",
      )
  
      parser.add_argument(
          "--ondata",
          "-o",
          action="store_true",
          help="Plot fake indicator on the data",
      )
  
      parser.add_argument(
          "--plot",
          "-p",
          nargs="?",
          required=False,
          metavar="kwargs",
          const=True,
          help=(
              "Plot the read data applying any kwargs passed\n"
              "\n"
              "For example:\n"
              "\n"
              '  --plot style="candle" (to plot candles)\n'
          ),
      )
  
      if pargs is not None:
          return parser.parse_args(pargs)
  
      return parser.parse_args()
  
file_path: backtrader/samples/lineplotter/lineplotter.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import datetime
  import backtrader
label_desc: Use image node_id 2 for calling a global function with example usage: parse_args(pargs) and returns: parser, parser