I don't actually need the object to persist across sessions - just within a single session, so that each time Nuke edits the node, the same class instance exists. If I have to recreate it each time, it just means that I'm re-opening a file and interpreting its contents over and over in response to a mouse click, which is slow.
Chris On Thu, Jan 26, 2012 at 10:33 AM, Nathan Rusch <[email protected]>wrote: > The only way to do this between Nuke sessions would be to serialize the > Python object somehow and store it in a text knob on the node. > > The Node.metadata() method is returning a copy of the node’s metadata in > the form of a dictionary (presumably assembled from the underlying > DDImage::MetaData::Bundle object every time the method is called). The > dictionary object is not actually directly associated with the node, and is > in no way stored with the node itself. > > -Nathan > > > *From:* Christopher Horvath <[email protected]> > *Sent:* Thursday, January 26, 2012 10:18 AM > *To:* Nuke Python discussion <[email protected]> > *Subject:* [Nuke-python] Storing blind user data on nodes with Python > > Hello Again, Nuke! > > Is there a way to create an instance of a Python object and have it be > persistently stored with a node instance? I was thinking I could just add > the instance to the node's metadata, which seems to be just a python > dictionary, and therefore capable of storing any Python object. However, I > wasn't sure if the dictionary was created on the fly as a mirror of some > internal, non-pythonic representation. Also, metadata seems to be copied > from one node to the next, which could be confusing with respect to this > unusual usage of it. > > I have a python class (which, sadly, I don't have a C++ version of ) which > carries some moderately expensive state with it that I need to use to > compute parameter data for the node. I'd like to be able to create an > instance of this class and stick it onto the node (like UserData on Widgets > in Xt). Can I do this? > > Chris > > > > -- > I think this situation absolutely requires that a really futile and stupid > gesture be done on somebody's part. And we're just the guys to do it. > > ------------------------------ > _______________________________________________ > Nuke-python mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python > > > _______________________________________________ > Nuke-python mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python > > -- I think this situation absolutely requires that a really futile and stupid gesture be done on somebody's part. And we're just the guys to do it.
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