Re: [pcp] [RFC] pcp python patch

[Nathan Scott <nathans@xxxxxxxxxx>]

----- Original Message -----
> [...]
> So, commit b2e3b5c in the pcpfans.git dsmith/dev branch does things as I
> discussed above. That dramatically simplifies the changes to pmda.py (1)
> and the refresh_metrics wrapper in pmda.py goes completely away.

Nice.

> (1) Except for one thing. I about went nuts with one problem. So we
> stashed list/dictionary references down in cpmda. I'd update the
> list/dictionaries in pmda.py and would see newly added metric info, but
> if I cleared the metrics, I'd still get the old values. I finally
> figured out the difference between 'dict = []' and 'dict.clear()'. The
> former assigns a new empty dictionary while the latter clears out the
> current dictionary. At the pmda.py level there really isn't any
> difference, but the caused problems for cpmda which had a stashed
> reference to the original dictionary, not the new one.

Argh!  Good find.  Do we need a new API to allow new dictionary object
ref(s) to be pushed down to cpmda, overwriting the old?

cheers.

--
Nathan