Thanks Dino for the explanation. float(obj.M1.M2.M3) leads to Message: 'xxx' object has no attribute '__float__' clr.Convert(obj.M1.M2.M3, float) *does *work.
Interesting observation: For imported .NET function C.SetFloat(float a), C.SetFloat(obj.M1.M2.M3) won't trigger the conversion as well. On Fri, Jun 24, 2011 at 4:17 PM, Dino Viehland <di...@microsoft.com> wrote: > In IronPython an assignment to a local/global variable will never perform > a conversion. In your C# code the conversion has to happen because the > variable you’re assigning to is typed as double. **** > > ** ** > > To force the conversion you should be able to do float(obj.M1.M2.M3) or you > can use the clr.Convert function.**** > > ** ** > > *From:* ironpython-users-bounces+dinov=microsoft....@python.org [mailto: > ironpython-users-bounces+dinov=microsoft....@python.org] *On Behalf Of * > zxpatric > *Sent:* Friday, June 24, 2011 1:00 PM > *To:* ironpython-users@python.org > *Subject:* [Ironpython-users] DynamicObjects.TryConvert not called in > IronPython?**** > > ** ** > > Hi,**** > > ** ** > > I am doing the similar thing as in " > http://blogs.msdn.com/b/csharpfaq/archive/2009/10/19/dynamic-in-c-4-0-creating-wrappers-with-dynamicobject.aspx"; > to first convert any member into an object and then expect the > object.TryConvert to handle the final convert. However, what is working in > C# as double a = obj.M1.M2.M3 (return instance of Type C3, which has the > TryConvert to convert it to double type) doesn't work in IronPython. The > last step of converting instance of C3 to double in C3.TryConvert never > happens. I am currently using IronPython 2.7.0.40. Is this a known issue > that has been addressed in 2.7.1 Beta?**** > > ** ** > > Thanks**** > > -Patrick**** >
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