old_contents: #!/usr/bin/python -tt
  
  """
  Simplistic Python SysFS interface.
  
  Shamelessly stolen from:
      http://stackoverflow.com/questions/4648792/
  
  Usage::
      from sysfs import sys
  
      for bdev in sys.block:
          print bdev, str(sys.block[bdev].size / 1024 / 1024) + 'M'
  """
  
  __all__ = ['sys', 'Node']
  
  from os import listdir
  from os.path import isdir, isfile, join, realpath
  
  class Node(object):
      __slots__ = ['_path_', '__dict__']
  
      def __init__(self, path='/sys'):
          self._path_ = realpath(path)
          if not self._path_.startswith('/sys/') and not '/sys' == self._path_:
              raise RuntimeError('Using this on non-sysfs files is dangerous!')
  
          self.__dict__.update(dict.fromkeys(listdir(self._path_)))
  
      def __repr__(self):
          return '<sysfs.Node "%s">' % self._path_
  
      def __setattr__(self, name, val):
          if name.startswith('_'):
              #return object.__setattribute__(self, name, val)
              return object.__setattr__(self, name, val)
  
          path = realpath(join(self._path_, name))
          if isfile(path):
              with open(path, 'w') as fp:
                  fp.write(str(val))
          else:
              raise RuntimeError('Cannot write to non-files.')
  
      def __getattribute__(self, name):
          if name.startswith('_'):
              return object.__getattribute__(self, name)
  
          path = realpath(join(self._path_, name))
          if isfile(path):
              with open(path, 'r') as fp:
                  data = fp.read().strip()
              try:
                  return int(data)
              except ValueError:
                  return data
          elif isdir(path):
              return Node(path)
  
      def __setitem__(self, name, val):
          return setattr(self, name, val)
  
      def __getitem__(self, name):
          return getattr(self, name)
  
      def __iter__(self):
          return iter(listdir(self._path_))
  
  
  sys = Node()
  
  # vim:set sw=4 ts=4 et:
  # -*- coding: utf-8 -*-
  
new_contents: #!/usr/bin/python -tt
  
  """
  Simplistic Python SysFS interface.
  
  Shamelessly stolen from:
      http://stackoverflow.com/questions/4648792/
  
  Usage::
      from sysfs import sys
  
      for bdev in sys.block:
          print bdev, str(sys.block[bdev].size / 1024 / 1024) + 'M'
  """
  
  __all__ = ['sys', 'Node']
  
  from os import listdir
  from os.path import isdir, isfile, join, realpath
  
  class Node(object):
      __slots__ = ['_path_', '__dict__']
  
      def __init__(self, path='/sys'):
          self._path_ = realpath(path)
          if not self._path_.startswith('/sys/') and not '/sys' == self._path_:
              raise RuntimeError('Using this on non-sysfs files is dangerous!')
  
          self.__dict__.update(dict.fromkeys(listdir(self._path_)))
  
      def __repr__(self):
          return '<sysfs.Node "%s">' % self._path_
  
      def __setattr__(self, name, val):
          if name.startswith('_'):
              return object.__setattr__(self, name, val)
  
          path = realpath(join(self._path_, name))
          if isfile(path):
              with open(path, 'w') as fp:
                  fp.write(str(val))
          else:
              raise RuntimeError('Cannot write to non-files.')
  
      def __getattribute__(self, name):
          if name.startswith('_'):
              return object.__getattribute__(self, name)
  
          path = realpath(join(self._path_, name))
          if isfile(path):
              with open(path, 'r') as fp:
                  data = fp.read().strip()
              try:
                  return int(data)
              except ValueError:
                  return data
          elif isdir(path):
              return Node(path)
  
      def __setitem__(self, name, val):
          return setattr(self, name, val)
  
      def __getitem__(self, name):
          return getattr(self, name)
  
      def __iter__(self):
          return iter(listdir(self._path_))
  
  
  sys = Node()
  
  # vim:set sw=4 ts=4 et:
  # -*- coding: utf-8 -*-
  
subject: Remove commented line x2