[IronPython] deepcopy

Pablo Dalmazzo pablodalma93 at hotmail.com
Thu Jun 10 20:24:10 CEST 2010

yes there is a DBNull value. Thanks.

From: dinov at microsoft.com
To: users at lists.ironpython.com
Date: Thu, 10 Jun 2010 15:56:50 +0000
Subject: Re: [IronPython] deepcopy

Is there a DBNull value somewhere in your object?  DBNull is a singleton and I’d guess we’d need to add some custom logic which says the way we deserialize
 it is by pulling the singleton from DBNull.Value.  You can probably use copy_reg.pickle to register something which will handle objects of type DBNull that just returns DBNull.Value.

From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com]
On Behalf Of Pablo Dalmazzo

Sent: Thursday, June 10, 2010 7:57 AM

To: IronPython Mailing list

Subject: [IronPython] deepcopy


Hi there,


Im getting this error in the copy module. I moved the copy module from the IronPython 2.6 installation to work with

IronPython 2.0 for some compatibility problem I had with IronPython 2.6 dll with another dll we use. 


The only difference I see between the cases which works and those which doesnt are, in the succesful case it is a custom class object "alone", and in the error case is the
 deepcopy of a custom class object which contains a list with other instances of that object.

Could that have anything to do with the problem? Is that a limitation of the copy module in Python or it should work?


error description: 


No se puede encontrar el método 'DBNull..ctor'.

Error de código fuente: 

Línea 322:        args = deepcopy(args, memo)
Línea 323:    
Línea 324:    y = callable(*args)
Línea 325:
Línea 326:    memo[id(x)] = y

Archivo de origen: /SistemaVentaBaseIP2/App_Script/copy.py     

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