I think as of now copy is certainly not suitable for all .NET objects. For
starters not all .NET objects are serializable/copyable. There should probably
be some effort to close the gaps where it makes sense. For example something
which implements ICloneable could have a __copy__ method added to it. This is
similar to how we add a __reduce_ex__ method for things which implement
ISerializable. But if something doesn't implement either of these interfaces
then there's no standard way for us to copy these objects.
If you have specific object types which you know you need to copy I would
suggest registering the type with copy_reg. That should at least give you a
solution for your specific scenarios.
You also mentioned the null reference exception ("object reference not set to
object instance..."). That sounds like a bug - I would guess you're running in
a multi-threaded environment? If you could get a repro of this that'd be great
as it looks like it could be an issue w/ our dictionary implementation not
being thread safe.
From: [email protected]
[mailto:[email protected]] On Behalf Of Pablo Dalmazzo
Sent: Wednesday, October 13, 2010 11:51 AM
To: IronPython Mailing list
Subject: [IronPython] expected behavior of the module copy with .net objects
Hi guys,
Sorry for being annoying about this but I just want to know where I'm standing
at :)
It would seem to me the copy module has some problems copying .net objects in
general. I was wondering if I'm pretending too much for that module and it will
never fully copy objects instantiated from .net classes, or it's a goal for
it to do it someday, or I just happened to find a couple of errors, or Im not
using it rightly for what it was meant to be. I dont know 5% of what you know
so it's an honest question :)
Aside there are a couple of errors I cant reproduce, and that it didnt copy
System.DBNull , now I see it loses property values when copying
a System.Data.SqlConnection object, properties such as "DataSource",
"DataBase", etc. they get empty strings after being copied. Just in case
I tried with the original version of the module/file copy. I guess you have
thousands of things to check but I just want to know, it's the module supposed
to copy any object instantiated from .net classes or it's only supposed to
fully work only for custom made classes?
Greetings, Pablo Dalmazzo
P.S: sorry about insisting again with this but I've also added another example
where it seems to fail :)
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