[IronPython] clrtype: How to subclass ClrClass?

Shri Borde Shri.Borde at microsoft.com
Thu Feb 18 20:50:33 CET 2010

Sorry, I have not, and unfortunately will not be able to get to it until next week. Please vote on http://ironpython.codeplex.com/WorkItem/View.aspx?WorkItemId=26249 if you want to see it fixed in 2.6.1. Depending on the fix, it might have to wait until after 2.6.1

From: Lukas Cenovsky [mailto:cenovsky at bakalari.cz]
Sent: Thursday, February 18, 2010 5:29 AM
To: Shri Borde
Subject: Re: [IronPython] clrtype: How to subclass ClrClass?

Hello Shri,
have you had chance to look at this bug?

-- Lukáš

Shri Borde wrote:

It is a know bug. I can take a look next week.

-----Original Message-----

From: users-bounces at lists.ironpython.com<mailto:users-bounces at lists.ironpython.com> [mailto:users-bounces at lists.ironpython.com] On Behalf Of Michael Foord

Sent: Saturday, February 06, 2010 4:10 AM

To: Discussion of IronPython

Subject: Re: [IronPython] clrtype: How to subclass ClrClass?

On 06/02/2010 11:19, Lukas Cenovsky wrote:

Hi all,

it looks like I cannot subclass a class based on ClrClass metaclass:

IronPython 2.6 (2.6.10920.0) on .NET 2.0.50727.4927

Type "help", "copyright", "credits" or "license" for more information.

import clr

import clrtype

class Product(object):

... __metaclass__ = clrtype.ClrClass


p = Product()

print "CLR type name: %s" % p.GetType().FullName

CLR type name: Product

class MyProduct(Product):

... pass


Traceback (most recent call last):

File "<stdin>", line 1, in <module>

KeyError: The given key was not present in the dictionary.

Is it a bug or am I doing something wrong? Thanks.

Hehe, I ran into this a couple of days ago on Silverlight as well.

All the best,



-- Lukáš


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