In article <[EMAIL PROTECTED]>, Kent Johnson <[EMAIL PROTECTED]> wrote:
> Ron Garret wrote: > > The reason I want to do this is that I want to implement a trace > > facility that traces only specific class methods. I want to say: > > > > trace(c1.m1) > > > > and have c1.m1 be replaced with a wrapper that prints debugging info > > before actually calling the old value of m1. The reason I want that to > > be an instance of a callable class instead of a function is that I need > > a place to store the old value of the method so I can restore it, and I > > don't want to start building a global data structure because that gets > > horribly ugly, and a callable class is the Right Thing -- if there's a > > way to actually make it work. > > If the only reason for a callable class is to save a single value (the > original function), you could instead store it as an attribute of the > wrapper function. I considered that, and I may yet fall back on it, but 1) I wanted to understand how these things worked and 2) I need a way to tell when a method has been traced, and isinstance(method, tracer) seems less hackish to me than hasattr(method, 'saved_function'). rg -- http://mail.python.org/mailman/listinfo/python-list
