$getVar is pretty dumb. It takes whatever expression you give it, picks out
the part before the first period, then searches for that in the search
list. So, if you give it 'day.myobs' it searches for 'day' and finds it in
the search list. The engine then goes on to evaluate the results for an
attribute "myobs". It all works.
But, if you give it "day(data_binding='my_binding').myobs", then it will
literally search for "day(data_binding='my_binding')" in the search list
and, of course, not find it.
It's not clear what you're trying to do here, but I'll assume you have a
string that you assembled somehow that looks like
"day(data_binding='my_binding').myobs" and now you want to evaluate it. If
that's the case, you can't. Instead, you'll have to break it apart and use
getattr() (NOT TESTED):
getattr("day(data_binding='my_binding')", "myobs").max
If the aggregation is also in the form of a string, then you'll have to
break that out as well:
getattr(getattr("day(data_binding='my_binding')", "myobs"), "max")
Hope that helps.
-tk
On Wed, Nov 23, 2022 at 11:06 AM Karen K <kk4468...@gmail.com> wrote:
> I tried $getVar('day(data_binding="my_binding").myobs).max. This results
> in the error message ERROR weewx.cheetahgenerator: **** Reason: cannot
> find 'day(data_binding="my_binding")'. I guess that is not the right way
> to do it. So how do I specify a binding if using $getVar()?
>
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