def RunCommand(self):
    """Command entry point for the cat command."""
    show_header = False
    request_range = None
    start_byte = 0
    end_byte = None
    if self.sub_opts:
      for o, a in self.sub_opts:
        if o == '-h':
          show_header = True
        elif o == '-r':
          request_range = a.strip()
          range_matcher = re.compile(
              '^(?P<start>[0-9]+)-(?P<end>[0-9]*)$|^(?P<endslice>-[0-9]+)$')
          range_match = range_matcher.match(request_range)
          if not range_match:
            raise CommandException('Invalid range (%s)' % request_range)
          if range_match.group('start'):
            start_byte = long(range_match.group('start'))
          if range_match.group('end'):
            end_byte = long(range_match.group('end'))
          if range_match.group('endslice'):
            start_byte = long(range_match.group('endslice'))
        else:
          self.RaiseInvalidArgumentException()

    return CatHelper(self).CatUrlStrings(self.args,
                                         show_header=show_header,
                                         start_byte=start_byte,
                                         end_byte=end_byte)
dataset/ETHPy150Open GoogleCloudPlatform/gsutil/gslib/commands/cat.py/CatCommand.RunCommand/original