code: def doctemplate(*args):
      
      def decorator(func):
          func.__doc__ = func.__doc__ % tuple(args)
          return func
      return decorator
docs: Return a decorator putting ``args`` into the docstring of the decorated ``func``.
  
      >>> @doctemplate('spam', 'spam')
      ... def spam():
      ...     '''Returns %s, lovely %s.'''
      ...     return 'Spam'
  
      >>> spam.__doc__
      'Returns spam, lovely spam.'