That's wise. :-) The alternative is a search list extension, dedicated to producing the proper string. Its use would look like
<p>The air quality is $aq_category($current.aqi_pm2_51.raw)</p> That's not so bad. -tk On Tue, Nov 3, 2020 at 4:49 AM Graham Eddy <[email protected]> wrote: > thanks (i think). > if i use this - and i have yet to come up with a feasible alternative - i > think i’ll bury it under a pile of leaves at the bottom of the file... > > On 2 Nov 2020, at 11:14 pm, Tom Keffer <[email protected]> wrote: > > I can't think of any elegant way to do it, but an inelegant way is to > monkey patch ValueHelper. > > import weewx.units > > def category(vh): > if vh.raw is None: > result = "N/A" > elif vh.raw < 50: > result = "good" > elif vh.raw < 100: > result = "moderate" > else: > result = "bad" > return result > > weewx.units.ValueHelper.category = category > > > The ValueHelper class has been pretty stable for a long time, so you're > unlikely to break things in an upgrade. But, there's no guarantees! > > -tk > > On Mon, Nov 2, 2020 at 1:12 AM Graham Eddy <[email protected]> wrote: > >> there is an existing optional formatting tag ‘ordinal_compass’ for >> data_type ‘windDir’ >> eg. where $current.windDir.raw = 45, $current.windDir.ordinal_compass = >> “NE" >> >> i would like to create a new optional formatting tag ‘category’ for new >> xtype ‘aqi_pm2_51’ (air quality index derived PM2.5) >> e.g. where $current.aqi_pm2_51.raw = 75, $current.aqi_pm2_51.category = >> “Moderate” >> >> how do i create the new optional formatting tag? >> so far all i have found is to extend weewx.units.ValueHelper - i guess a >> function called “catgeory” would be picked up to do the formatting. but >> this would require changing rather than extending weewx codebase. >> have i missed something obvious? >> >> -- >> You received this message because you are subscribed to the Google Groups >> "weewx-user" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/weewx-user/487EFABB-872F-449C-A685-8BB5FD83EF98%40gmail.com >> . >> > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/CAPq0zEA-biYRcrTk__y2-Avam%2BcW9U0-z0iDjxc%2BdW%3DH-dkq1g%40mail.gmail.com > <https://groups.google.com/d/msgid/weewx-user/CAPq0zEA-biYRcrTk__y2-Avam%2BcW9U0-z0iDjxc%2BdW%3DH-dkq1g%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/B6BE9719-0EC9-4DF2-A68A-A34A272CF1DA%40gmail.com > <https://groups.google.com/d/msgid/weewx-user/B6BE9719-0EC9-4DF2-A68A-A34A272CF1DA%40gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/CAPq0zEB6ZVNDCi52gSehYfEn%2BwLv5vw%3DSK%2BMEe_FbRrecW0Paw%40mail.gmail.com.
