writing image from Python wrapper with xDensity gives "unknown attribute" warning

[yellowtailfan]

I am calling OpenEXR via PyEXR which in turn uses the OpenEXR Python wrapper.

When I try to write an image with an xDensity attribute, a warning is printed and the attribute is not stored in the written image:

XXX - unknown attribute: xDensity

The issue seems to be that the list of attributes in the Python wrapper is a subset of the full attribute list.