pmfg / pmapi / null indom

Hi,

Consider the following example:

#!/usr/bin/python

from pcp import pmapi

pmfg = pmapi.fetchgroup()
sysload = pmfg.extend_indom("kernel.all.sysfork")

pmfg.fetch()
for inst, name, value in sysload():
    print("inst: %d" % inst)

This prints:

inst: -1

Is this some constant or should this be None in the land of Python?

Thanks,

-- 
Marko Myllynen

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