old_contents: """functools.py - Tools for working with functions and callable objects
  """
  # Python module wrapper for _functools C module
  # to allow utilities written in Python to be added
  # to the functools module.
  # Written by Nick Coghlan <ncoghlan at gmail.com>
  #   Copyright (C) 2006 Python Software Foundation.
  # See C source code for _functools credits/copyright
  
  from _functools import partial
  
  # update_wrapper() and wraps() are tools to help write
  # wrapper functions that can handle naive introspection
  
  WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__doc__')
  WRAPPER_UPDATES = ('__dict__',)
  def update_wrapper(wrapper,
                     wrapped,
                     assigned = WRAPPER_ASSIGNMENTS,
                     updated = WRAPPER_UPDATES):
      """Update a wrapper function to look like the wrapped function
  
         wrapper is the function to be updated
         wrapped is the original function
         assigned is a tuple naming the attributes assigned directly
         from the wrapped function to the wrapper function (defaults to
         functools.WRAPPER_ASSIGNMENTS)
         updated is a tuple naming the attributes of the wrapper that
         are updated with the corresponding attribute from the wrapped
         function (defaults to functools.WRAPPER_UPDATES)
      """
      for attr in assigned:
          setattr(wrapper, attr, getattr(wrapped, attr))
      for attr in updated:
          getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
      # Return the wrapper so this can be used as a decorator via partial()
      return wrapper
  
  def wraps(wrapped,
            assigned = WRAPPER_ASSIGNMENTS,
            updated = WRAPPER_UPDATES):
      """Decorator factory to apply update_wrapper() to a wrapper function
  
         Returns a decorator that invokes update_wrapper() with the decorated
         function as the wrapper argument and the arguments to wraps() as the
         remaining arguments. Default arguments are as for update_wrapper().
         This is a convenience function to simplify applying partial() to
         update_wrapper().
      """
      return partial(update_wrapper, wrapped=wrapped,
                     assigned=assigned, updated=updated)
  
new_contents: """functools.py - Tools for working with functions and callable objects
  """
  # Python module wrapper for _functools C module
  # to allow utilities written in Python to be added
  # to the functools module.
  # Written by Nick Coghlan <ncoghlan at gmail.com>
  #   Copyright (C) 2006 Python Software Foundation.
  # See C source code for _functools credits/copyright
  
  from _functools import partial
  from __builtin__ import reduce
  
  # update_wrapper() and wraps() are tools to help write
  # wrapper functions that can handle naive introspection
  
  WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__doc__')
  WRAPPER_UPDATES = ('__dict__',)
  def update_wrapper(wrapper,
                     wrapped,
                     assigned = WRAPPER_ASSIGNMENTS,
                     updated = WRAPPER_UPDATES):
      """Update a wrapper function to look like the wrapped function
  
         wrapper is the function to be updated
         wrapped is the original function
         assigned is a tuple naming the attributes assigned directly
         from the wrapped function to the wrapper function (defaults to
         functools.WRAPPER_ASSIGNMENTS)
         updated is a tuple naming the attributes of the wrapper that
         are updated with the corresponding attribute from the wrapped
         function (defaults to functools.WRAPPER_UPDATES)
      """
      for attr in assigned:
          setattr(wrapper, attr, getattr(wrapped, attr))
      for attr in updated:
          getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
      # Return the wrapper so this can be used as a decorator via partial()
      return wrapper
  
  def wraps(wrapped,
            assigned = WRAPPER_ASSIGNMENTS,
            updated = WRAPPER_UPDATES):
      """Decorator factory to apply update_wrapper() to a wrapper function
  
         Returns a decorator that invokes update_wrapper() with the decorated
         function as the wrapper argument and the arguments to wraps() as the
         remaining arguments. Default arguments are as for update_wrapper().
         This is a convenience function to simplify applying partial() to
         update_wrapper().
      """
      return partial(update_wrapper, wrapped=wrapped,
                     assigned=assigned, updated=updated)
  
subject: Patch # 1739906 by Christian Heimes -- add reduce to functools (importing it from __builtin__).