Any examples to adding custom user properties to MetaData with python.

[Paul Winex]

Hi. I Ask help to search any examples with adding custom meta data (http://docs.alembic.io/python/alembic/abca.html?highlight=abccoreabstract#alembic.AbcCoreAbstract.MetaData) to archive.
I have some examples for maya https://gist.github.com/paulwinex/6814446f292d7eab822a and now i need to write custom user data to file to use it without unpack archive in houdini. Maybe anyone can share part of code?
thanks.

[Lucas Miller]

What will you be storing in this custom user data?
Using AbcCoreAbstract::MetaData may not be appropriate.

Lucas

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[Paul Winex]

Actially a need write some perprimirive data that I can use without unpack alembic in houdini. When i load user properies as "Values Only" or "Values and Metadata" houdini create new per prim attribute without unpack archive. How i can write my data to this values for each alembic primitive (object)?

[Paul Winex]

I found this way:

f = alembic.Abc.OArchive(filename)
top = f.getTop()
...
meshObj = OPolyMesh(xform, 'cube1Shape')
...
u = meshObj.getSchema().getUserProperties()
prop = alembic.Abc.OStringProperty(u, "somename")
prop.setValue('somevalue')

But all data store in abc_userProperties attribute as json string.
Can i create different attribute in houdini and use it without unpack?