old_contents: """Main module for visual profiler."""
  import argparse
  import os
  import sys
  
  from collections import OrderedDict
  from vprof import code_heatmap
  from vprof import memory_profile
  from vprof import runtime_profile
  from vprof import stats_server
  
  _PROGRAN_NAME = 'vprof'
  _MODULE_DESC = 'Python visual profiler'
  _HOST = 'localhost'
  _PROFILERS = (
      ('c', runtime_profile.RuntimeProfile),
      ('m', memory_profile.MemoryProfile),
      ('h', code_heatmap.CodeHeatmapProfile),
  )
  _MODES_DESC = (
  """modes configuration
  available modes:
    c - runtime flame chart
    m - memory graph
    h - code heatmap""")
  
  
  def main():
      """Visual profiler main function."""
      parser = argparse.ArgumentParser(
          prog=_PROGRAN_NAME, description=_MODULE_DESC,
          formatter_class=argparse.RawTextHelpFormatter)
      parser.add_argument('profilers', metavar='options', help=_MODES_DESC)
      parser.add_argument('source', metavar='src', nargs=1,
                          help='Python module to profile')
      parser.add_argument('--port', dest='port', default=8000, type=int,
                          help='set internal webserver port')
      parser.add_argument('--debug', dest='debug_mode',
                          action='store_true', default=False,
                          help="don't suppress error messages")
      parser.add_argument('-n', '--no-browser', dest='dont_start_browser',
                          action='store_true', default=False,
                          help="don't start browser after profiling")
      args = parser.parse_args()
  
      if len(args.profilers) > len(set(args.profilers)):
          print('Profiler configuration is ambiguous. Remove duplicates.')
          sys.exit(1)
  
      available_profilers = {opt for opt, _ in _PROFILERS}
      for option in args.profilers:
          if option not in available_profilers:
              print('Unrecognized option: %s' % option)
              sys.exit(2)
  
      sys.argv[:] = args.source
      program_name, program_stats = args.source[0], OrderedDict()
      present_profilers = ((s, p) for s, p in _PROFILERS if s in args.profilers)
      for option, profiler in present_profilers:
          curr_profiler = profiler(program_name)
          print('Running %s...' % curr_profiler.__class__.__name__)
          program_stats[option] = curr_profiler.run()
      if not args.debug_mode:
          sys.stderr = open(os.devnull, "w")
      print('Starting HTTP server...')
      stats_server.start(
          _HOST, args.port, program_stats, args.dont_start_browser)
  
  if __name__ == "__main__":
      main()
  
new_contents: """Main module for visual profiler."""
  import argparse
  import os
  import sys
  
  from collections import OrderedDict
  from vprof import code_heatmap
  from vprof import memory_profile
  from vprof import runtime_profile
  from vprof import stats_server
  
  _PROGRAN_NAME = 'vprof'
  _MODULE_DESC = 'Python visual profiler'
  _HOST = 'localhost'
  _PROFILERS = (
      ('c', runtime_profile.RuntimeProfile),
      ('m', memory_profile.MemoryProfile),
      ('h', code_heatmap.CodeHeatmapProfile),
  )
  _MODES_DESC = (
      """modes configuration
  available modes:
    c - runtime flame chart
    m - memory graph
    h - code heatmap""")
  
  
  def main():
      """Visual profiler main function."""
      parser = argparse.ArgumentParser(
          prog=_PROGRAN_NAME, description=_MODULE_DESC,
          formatter_class=argparse.RawTextHelpFormatter)
      parser.add_argument('profilers', metavar='options', help=_MODES_DESC)
      parser.add_argument('source', metavar='src', nargs=1,
                          help='Python module to profile')
      parser.add_argument('--port', dest='port', default=8000, type=int,
                          help='set internal webserver port')
      parser.add_argument('--debug', dest='debug_mode',
                          action='store_true', default=False,
                          help="don't suppress error messages")
      parser.add_argument('-n', '--no-browser', dest='dont_start_browser',
                          action='store_true', default=False,
                          help="don't start browser after profiling")
      args = parser.parse_args()
  
      if len(args.profilers) > len(set(args.profilers)):
          print('Profiler configuration is ambiguous. Remove duplicates.')
          sys.exit(1)
  
      available_profilers = {opt for opt, _ in _PROFILERS}
      for option in args.profilers:
          if option not in available_profilers:
              print('Unrecognized option: %s' % option)
              sys.exit(2)
  
      sys.argv[:] = args.source
      program_name, program_stats = args.source[0], OrderedDict()
      present_profilers = ((s, p) for s, p in _PROFILERS if s in args.profilers)
      for option, profiler in present_profilers:
          curr_profiler = profiler(program_name)
          print('Running %s...' % curr_profiler.__class__.__name__)
          program_stats[option] = curr_profiler.run()
      if not args.debug_mode:
          sys.stderr = open(os.devnull, "w")
      print('Starting HTTP server...')
      stats_server.start(
          _HOST, args.port, program_stats, args.dont_start_browser)
  
  if __name__ == "__main__":
      main()
  
subject: Fix lint warning.