>>>>> Paddy <[EMAIL PROTECTED]> (P) wrote: >P> Hi, >P> # If I have a function definition >P> def f1(arg): >P> global capturecall >P> if capturecall: >P> ... >P> do_normal_stuff(arg)
>P> # and its later use: >P> def f2(): >P> ... >P> return f1(a and (b or c)) >P> # I would like to do: >P> capturecall = False >P> result = f2() >P> # And get the equivalent of do_normal_stuff(a and(b or c)) >P> # But also to do: >P> capturecall = True >P> result = f2() >P> # And get the same result, but also save the actual >P> # calling arguments to f1 either as a string: >P> # "a and (b or c))" >P> # Or a code object computing a and(b or c) >P> # I caould change f1 to expect a function instead and do: >P> def f1b(arg): >P> global capturecall >P> if capturecall: >P> save(arg) >P> return do_normal_stuff(arg()) >P> # And then use it like this: >P> def f2b(): >P> ... >P> return f1b(lambda : (a and (b or c)) ) >P> # The problem is that for my application to work, >P> # Python newbies would have to write lambda when they >P> # know they are after the result. Its my program >P> # that would require the lambda (or def), which >P> # is a distraction from their problem. >P> Any ideas on implementing f1 so I can do f2? With Python this can't be done without either quoting the expression (make a string out of it) or using a lambda. Lisp and C# can do this kind of thing. -- Piet van Oostrum <[EMAIL PROTECTED]> URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4] Private email: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
