On Fri, 02 Sep 2016 23:44:50 +1000, Ben Finney wrote: > Smith <sm...@smith.com> writes: > >> I'm trying to understand the concept of * args and ** kwarg with >> python3 > > Welcome. Your questions are fine in this forum; but you may also want to > participate in our collaborative learning forum for Python beginners, > <URL:https://mail.python.org/mailman/listinfo/tutor>. > >> But I can not understand why I returns the error message "SyntaxError: >> positional argument follows the keyword argument" when I insert values. > > It's fairly simple (though it may not be obvious!): > >> In [23]: start(data="Fish",2,3,tox="tux") >> File "<ipython-input-23-eb9c3abb9941>", line 1 >> start(data="Fish",2,3,tox="tux") >> ^ >> SyntaxError: positional argument follows keyword argument > > Exactly. > > Note that this has nothing to do with how the function is defined; in > the definition of the function, parameters are neither positional nor > keyword. You name each of them, and you define an order for them; and > neither of those makes any of them “positional” or “keyword”. > > Rather, “positional argument and “keyword argument” are characteristics > of the arguments you *supply* in a particular call to the function. > > You have specified four arguments, in this order: > > * A keyword argument, ‘data="Fish"’. > * A positional argument, ‘2’. > * A positional argument, ‘3’. > * A keyword argument, ‘tox="tux"’. > > After specifying a keyword argument, you may not then specify any > positional arguments. Hence the SyntaxError.
& the solution is to change the order of the definition def start( must_have,*args,**kwargs,data=none): -- Pretend to spank me -- I'm a pseudo-masochist! -- https://mail.python.org/mailman/listinfo/python-list
