old_contents: from __future__ import print_function, absolute_import, division
  
  import sys
  import argparse
  
  from .. import __version__
  from . import dmutinf
  from . import dtent
  
  
  def main():
      help = ('MDEntropy is a python library that allows users to perform '
              'information-theoretic analyses on molecular dynamics (MD) '
              'trajectories.')
      p = argparse.ArgumentParser(description=help)
      p.add_argument(
          '-V', '--version',
          action='version',
          version='mdentropy %s' % __version__,
      )
      sub_parsers = p.add_subparsers(
          metavar='command',
          dest='cmd',
      )
  
      dmutinf.configure_parser(sub_parsers)
      dtent.configure_parser(sub_parsers)
  
      if len(sys.argv) == 1:
          sys.argv.append('-h')
  
      args = p.parse_args()
      args_func(args, p)
  
  
  def args_func(args, p):
      try:
          args.func(args, p)
      except RuntimeError as e:
          sys.exit("Error: %s" % e)
      except Exception as e:
          if e.__class__.__name__ not in ('ScannerError', 'ParserError'):
              message = """\
  An unexpected error has occurred with mdentropy (version %s), please
  consider sending the following traceback to the osprey GitHub issue tracker at:
          https://github.com/msmbuilder/mdentropy/issues
  """
              print(message % __version__, file=sys.stderr)
          raise  # as if we did not catch it
  
new_contents: from __future__ import print_function, absolute_import, division
  
  import sys
  import argparse
  
  from .. import __version__
  from . import dmutinf
  from . import dtent
  
  
  def main():
      help = ('MDEntropy is a python library that allows users to perform '
              'information-theoretic analyses on molecular dynamics (MD) '
              'trajectories.')
      p = argparse.ArgumentParser(description=help)
      p.add_argument(
          '-V', '--version',
          action='version',
          version='mdentropy %s' % __version__,
      )
      sub_parsers = p.add_subparsers(
          metavar='command',
          dest='cmd',
      )
  
      dmutinf.configure_parser(sub_parsers)
      dtent.configure_parser(sub_parsers)
  
      if len(sys.argv) == 1:
          sys.argv.append('-h')
  
      args = p.parse_args()
      args_func(args, p)
  
  
  def args_func(args, p):
      try:
          args.func(args, p)
      except RuntimeError as e:
          sys.exit("Error: %s" % e)
      except Exception as e:
          if e.__class__.__name__ not in ('ScannerError', 'ParserError'):
              message = """\
  An unexpected error has occurred with mdentropy (version %s), please
  consider sending the following traceback to the mdentropy GitHub issue tracker at:
          https://github.com/msmbuilder/mdentropy/issues
  """
              print(message % __version__, file=sys.stderr)
          raise  # as if we did not catch it
  
subject: Update main.py