Ezio Melotti added the comment: The docstring is correct, as this is how wraps is implemented (see Lib/functools.py#l73). partial(update_wrapper, wrapped=wrapped, assigned=assigned, updated=updated) will return a partial version of update_wrapper() where only the wrapper argument is missing. The missing argument is the function decorated with wraps().
For example, this code: def my_decorator(f): @wraps(f) def wrapper(*args, **kwds): return f(*args, **kwds) return wrapper is equivalent to: def my_decorator(f): def wrapper(*args, **kwds): return f(*args, **kwds) wrapper = wraps(f)(wrapper) return wrapper Here wraps(f) creates a partial version of update_wrapper, with only the "wrapped" argument (i.e. f) set. When the partial object returned by wrap(f) gets called, the missing "wrapper" argument is received, thus making wraps(f)(wrapper) equivalent to: def my_decorator(f): def wrapper(*args, **kwds): return f(*args, **kwds) wrapper = update_wrapper(wrapper, f) return wrapper That said, I agree that the sentence you quoted is not too clear/intuitive, but the following example is quite clear, so I'm not sure it's worth to removing/rephrasing the first part. Maybe it could say something like "This is a convenience function for invoking update_wrapper() (by using partial(update_wrapper, wrapped=wrapped, assigned=assigned, updated=updated)) as a function decorator when defining a wrapper function." instead? ---------- nosy: +ezio.melotti, r.david.murray, rhettinger, terry.reedy status: open -> pending type: -> enhancement versions: +Python 3.5 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue21928> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com