[IronPython] **kwargs and __getattr__ handling in csharp functions and classes?

[Curt Hagenlocher]

It should be Microsoft.Scripting.DynamicObject in 2.0.

On Tue, Apr 14, 2009 at 11:02 AM, Alex News <anleewxs at gmail.com> wrote:

> Current IronPython = 2.01?  I have Microsoft.Scripting.Core
> referenced, and can't find DynamicObject.  There is an
> Microsoft.Scripting.Actions.IDynamicObject, and a
> Microsoft.Scripting.Runtime.IOldDynamicObject.  I'm sure I'm missing
> something very basic.
>
> We are using .net 2.0.50727 SP1
>
>
>
>
> On Tue, Apr 14, 2009 at 12:12 PM, Curt Hagenlocher <curt at hagenlocher.org>
> wrote:
> > In current versions of IronPython, DynamicObject is in
> > Microsoft.Scripting.Core as Microsoft.Scripting.DynamicObject.  In .NET
> 4.0
> > System.Core, the same class will be called System.Dynamic.DynamicObject.
> (I
> > just noticed this naming discrepancy today, and I think we should
> probably
> > move it to at least Microsoft.Dynamic for the 2.6 release.)
> >
> > On Tue, Apr 14, 2009 at 8:31 AM, Alex News <anleewxs at gmail.com> wrote:
> >>
> >> Much appreciated, I will give that a try.  In what namespace is
> >> DynamicObject declared?  (I assume the required assemblies are already
> >> referenced if I'm pulling in IronPython).
> >>
> >> Thanks again,
> >> Alex
> >>
> >>
> >> On Tue, Apr 14, 2009 at 11:16 AM, Dino Viehland <dinov at microsoft.com>
> >> wrote:
> >> > For kwargs you need to decorate the function w/ a ParamDictionary
> >> > attribute such as:
> >> >
> >> > public void __init__(CodeContext/*!*/ context, object o,
> >> > [ParamDictionary] IAttributesCollection kwArgs)
> >> >
> >> > For __getattr__ IronPython will recognize a special name
> >> > "GetBoundMember" method such as:
> >> >
> >> > using System;
> >> > using System.Runtime.CompilerServices;
> >> >
> >> > public class Foo {
> >> >    [SpecialName]
> >> >    public object GetBoundMember (string name) {
> >> >        return name;
> >> >    }
> >> > }
> >> >
> >> >
> >> > You can also do "GetCustomMember" which is like __getattribute__.  But
> >> > for this one what you really want to do is inherit directly from the
> >> > DynamicObject class and override TryGetMember.  Then it'll work not
> only w/
> >> > Python but w/ other DLR based languages as well (e.g. C#, VB.NET<http://vb.net/>,
> IronRuby,
> >> > etc...).
> >> >
> >> >
> >> >> -----Original Message-----
> >> >> From: users-bounces at lists.ironpython.com [mailto:users-
> >> >> bounces at lists.ironpython.com] On Behalf Of Alex News
> >> >> Sent: Tuesday, April 14, 2009 7:32 AM
> >> >> To: users at lists.ironpython.com
> >> >> Subject: [IronPython] **kwargs and __getattr__ handling in csharp
> >> >> functions and classes?
> >> >>
> >> >> I would like to write some functions and classes in csharp that
> >> >> interact nicely python.  I would like to write a function that can
> >> >> respond to keyword arguments, and a class that can dynamically
> resolve
> >> >> __getattr__.
> >> >>
> >> >> For the function I tried creating a function that takes a
> >> >> IronPython.Runtime.PythonDictionary, but did not work.  For a class I
> >> >> tried creating a function that have a method __getattr__, but that
> >> >> failed too.
> >> >>
> >> >> I see there is a IronPython.Runtime.PythonFunction and some other
> >> >> interesting classes in the Runtime, but it is not apparent exactly
> how
> >> >> I could use them.
> >> >>
> >> >> I can, luckily, fudge much of what I want to do by creating small
> >> >> python classes and functions in python to proxy the values to
> >> >> underlying csharp classes.  However thing would be cleaner if I could
> >> >> do it directly in csharp.
> >> >>
> >> >> Thanks in advance for any suggestions.
> >> >>
> >> >> Alex
> >> >> _______________________________________________
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> >> >> Users at lists.ironpython.com
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> >> >
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> >> >
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> >
> >
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