old_contents: # A more or less complete user-defined wrapper around list objects
  
  class UserList:
  	def __init__(self, list = None):
  		self.data = []
  		if list is not None:
  			if type(list) == type(self.data):
  				self.data[:] = list
  			else:
  				self.data[:] = list.data[:]
  	def __repr__(self): return repr(self.data)
  	def __cmp__(self, list):
  		if type(list) == type(self.data):
  			return cmp(self.data, list)
  		else:
  			return cmp(self.data, list.data)
  	def __len__(self): return len(self.data)
  	def __getitem__(self, i): return self.data[i]
  	def __setitem__(self, i, item): self.data[i] = item
  	def __delitem__(self, i): del self.data[i]
  	def __getslice__(self, i, j):
  		userlist = self.__class__()
  		userlist.data[:] = self.data[i:j]
  		return userlist
  	def __setslice__(self, i, j, list):
  		if type(list) == type(self.data):
  			self.data[i:j] = list
  		else:
  			self.data[i:j] = list.data
  	def __delslice__(self, i, j): del self.data[i:j]
  	def __add__(self, list):
  		if type(list) == type(self.data):
  			return self.__class__(self.data + list)
  		else:
  			return self.__class__(self.data + list.data)
  	def __radd__(self, list):
  		if type(list) == type(self.data):
  			return self.__class__(list + self.data)
  		else:
  			return self.__class__(list.data + self.data)
  	def __mul__(self, n):
  		return self.__class__(self.data*n)
  	__rmul__ = __mul__
  	def append(self, item): self.data.append(item)
  	def insert(self, i, item): self.data.insert(i, item)
  	def pop(self, i=-1): return self.data.pop(i)
  	def remove(self, item): self.data.remove(item)
  	def count(self, item): return self.data.count(item)
  	def index(self, item): return self.data.index(item)
  	def reverse(self): self.data.reverse()
  	def sort(self, *args): apply(self.data.sort, args)
  
new_contents: # A more or less complete user-defined wrapper around list objects
  
  class UserList:
  	def __init__(self, list = None):
  		self.data = []
  		if list is not None:
  			if type(list) == type(self.data):
  				self.data[:] = list
  			else:
  				self.data[:] = list.data[:]
  	def __repr__(self): return repr(self.data)
  	def __cmp__(self, list):
  		if type(list) == type(self.data):
  			return cmp(self.data, list)
  		else:
  			return cmp(self.data, list.data)
  	def __len__(self): return len(self.data)
  	def __getitem__(self, i): return self.data[i]
  	def __setitem__(self, i, item): self.data[i] = item
  	def __delitem__(self, i): del self.data[i]
  	def __getslice__(self, i, j):
  		userlist = self.__class__()
  		userlist.data[:] = self.data[i:j]
  		return userlist
  	def __setslice__(self, i, j, list):
  		if type(list) == type(self.data):
  			self.data[i:j] = list
  		else:
  			self.data[i:j] = list.data
  	def __delslice__(self, i, j): del self.data[i:j]
  	def __add__(self, list):
  		if type(list) == type(self.data):
  			return self.__class__(self.data + list)
  		else:
  			return self.__class__(self.data + list.data)
  	def __radd__(self, list):
  		if type(list) == type(self.data):
  			return self.__class__(list + self.data)
  		else:
  			return self.__class__(list.data + self.data)
  	def __mul__(self, n):
  		return self.__class__(self.data*n)
  	__rmul__ = __mul__
  	def append(self, item): self.data.append(item)
  	def insert(self, i, item): self.data.insert(i, item)
  	def pop(self, i=-1): return self.data.pop(i)
  	def remove(self, item): self.data.remove(item)
  	def count(self, item): return self.data.count(item)
  	def index(self, item): return self.data.index(item)
  	def reverse(self): self.data.reverse()
  	def sort(self, *args): apply(self.data.sort, args)
  	def extend(self, list): self.data.extend(list)
  
subject: Add extend() method. A small New Year's present from Jean-Claude Wippler.