Tom, thank you very much for your support. You are right. The error comes from $trend.outTemp.raw < 0 $trend.barometer.raw < 0 $trend.inTemp.raw < 0 with a new empty weewx sqlite3 database.
I enclosed these in an 'if is not None' statement and replaced all 'is not' with '!=' at the same time, because I got syntax warnings. For information, how long does it take with a new empty weewx sqlite3 database until first trend values become available? tke...@gmail.com schrieb am Samstag, 12. November 2022 um 18:49:41 UTC+1: > Finding errors raised by the Cheetah template engine can be very > difficult. It does not give a lot of useful information. > > However, the error did not come from the two lines you posted. We can be > sure of that because they did not use the operator '<'. > > Look for a line that uses the less than operator. I would also guess that > it will have a variable on the left side of the operator, and an integer on > the right. Something like "x < 2". > > If all else fails, what I do is split the template in half and see if I > get an error. If so, I know which half it's in. Split again in half, and so > on. Eventually you will isolate it down to the offending line. > > -tk > > On Sat, Nov 12, 2022 at 7:56 AM Copain <copa...@gmail.com> wrote: > >> Many thanks for the continuous develompent of the weewx weather software. >> >> Currently I am testing weewx 4.9.1 with python 3.9.2 in a virtual machine. >> My life system runs weewx 4.4.0 with python 3.7.3. >> >> On the virtual machine, one of my templates generates the following error: >> TypeError: '<' not supported between instances of 'NoneType' and 'int' >> >> Probably the error originates from either of this code: >> #if $day.wind.vecdir.raw is not None and $day.windSpeed.max.raw is not 0 >> #if $day.wind.gustdir.raw is not None and $day.wind.max.raw is not 0 >> >> Is the error handling different in the 2 python or weewx versions? >> Or could it come from wind.vecdir which - I believe - is not on the weewx >> sqlite3 database? >> >> How should I correct the code to avoid the error? >> >> Any help would be appreciated. >> Thank you. >> >> -- >> 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 weewx-user+...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/weewx-user/15b78b92-f1c8-49c6-b3e7-946094aee77dn%40googlegroups.com >> >> <https://groups.google.com/d/msgid/weewx-user/15b78b92-f1c8-49c6-b3e7-946094aee77dn%40googlegroups.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 weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/d8d599a0-898e-46d1-ac13-a969b188e666n%40googlegroups.com.
