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pmfg / pmapi / null indom

To: pcp developers <pcp@xxxxxxxxxxx>
Subject: pmfg / pmapi / null indom
From: Marko Myllynen <myllynen@xxxxxxxxxx>
Date: Tue, 27 Sep 2016 16:37:37 +0300
Delivered-to: pcp@xxxxxxxxxxx
Organization: Red Hat
Reply-to: Marko Myllynen <myllynen@xxxxxxxxxx>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0
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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