[EMAIL PROTECTED] pisze: > On Mar 18, 5:40 am, Jarek Zgoda <[EMAIL PROTECTED]> wrote: >> Say, I have a function defined as: >> >> def fun(arg_one, arg_two='x', arg_three=None): >> pass >> >> Is there any way to get actual arguments that will be effectively used >> when I call this function in various ways, like: >> >> fun(5) => [5, 'x', None] >> fun(5, arg_three=['a', 'b']) => [5, 'x', ['a', 'b']] >> fun(5, 'something') => [5, 'something', None] >> >> (et caetera, using all possible mixes of positional, keyword and default >> arguments) >> >> I'd like to wrap function definition with a decorator that intercepts >> not only passed arguments, but also defaults that will be actually used >> in execution. >> >> If this sounds not feasible (or is simply impossible), I'll happily >> throw this idea and look for another one. ;) > > It evaluates to a substantial problem. The combinations include > things that Python disallows, such as double-spec. of keywords and > spec'n of keys w/out a dictionary arg; as well as double-spec'ing of > inspection. How do you want to access the parameters? What is the > least redundant way? P.S. Does there exist a possible authority who > doesn't want me to post this?
Well, after some thinking and research I found this much more complicated than my first thoughts. However, I found that somebody already wrote some code to solve similar problem and even described what has to be done: http://wordaligned.org/articles/echo. Too bad for me, the most interesting part relies on features introduced with Python 2.5, while I am still on 2.4. Anyway, basics still works and fortunately I am in control in both function definitions and calls. -- Jarek Zgoda http://zgodowie.org/ "We read Knuth so you don't have to" - Tim Peters -- http://mail.python.org/mailman/listinfo/python-list
