Thanks, it worked like a charm! -Jeff
On Nov 19, 2007 10:37 AM, Dino Viehland <[EMAIL PROTECTED]> wrote: > You can use either the [Optional] attribute or the > [DefaultParameterValue(null)] attributes on the parameter in the C# signature > to mark the parameter as being optional. And if you're using a language > that's more friendly to default/optional attributes (e.g. VB.NET) you could > just use their native syntax which will generate one of those attributes. > > The interesting difference between these is I believe if you're typed to > object and do [Optional] you get Missing.Value instead of null so you can > disambiguate between the two. > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeff Hardy > Sent: Sunday, November 18, 2007 12:31 PM > To: Discussion of IronPython > Subject: [IronPython] Expose a C# function as a Python function taking a > default argument > > Hi all, > I have a function declared in C#: > void StartResponse(string status, List response_headers, Tuple exc_info); > > I need to pass this to a Python function, and the Python function will > call it. Currently, the code looks like this: > object responsesObj = engine.CallObject(callable, module, environ, new > StartResponseDelegate(StartResponse)); > > This works fine if all three arguments are passed. However, from the > Python side start_response has this signature: > def start_response(status, response_headers, exc_info=None) > > So my question is: How do I expose the C# function as a Python > function with a default argument? It looks like > Runtime.Calls.PythonFunction is what I want, but I couldn't figure out > how to call it - I tried tracing the code and ended up in the bowels > of the DLR. > > Thanks, > Jeff > _______________________________________________ > Users mailing list > Users@lists.ironpython.com > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com > _______________________________________________ > Users mailing list > Users@lists.ironpython.com > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com > _______________________________________________ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
