Ok so it's not easy. Maybe I should learn python :)
Thanks Greg On Sunday, 10 May 2020 22:13:48 UTC+10, Tom Keffer wrote: > > The problem here is not that the entire record is None (which should never > happen), but that a value inside the record is None. > > There are two choices: > 1. Explicitly check for None. This is the preferred solution. > 2. Alternatively, the code could be changed to catch the exception, > optionally log it, then ignore the exception. Problem with this solution is > that it can cover a lot of sins. > > -tk > > On Sun, May 10, 2020 at 4:52 AM Greg from Oz <[email protected] > <javascript:>> wrote: > >> Hi tom, >> >> In the alarm.py how would I put the None check in the code rather than >> make the expression have the check code. >> >> I think it's on this line: >> if eval(self.expression, None, record): # NOTE 3 >> >> Would it be: >> if record is not None and eval(self.expression, None, record): >> # NOTE 3 >> >> I am not a python programmer by the way. That way if any expression that >> could be none would be covered. IE you could put in rain > 0.0 >> >> Thanks >> >> On Sunday, 10 May 2020 21:29:14 UTC+10, Tom Keffer wrote: >>> >>> I suspect 'rain' occasionally has the value 'None', which cannot be >>> compared to zero. Try this expression instead >>> >>> expression = 'rain is not None and rain > 0.0' >>> >>> -tk >>> >>> >>> On Sat, May 9, 2020 at 9:38 PM Ian Prescott <[email protected]> wrote: >>> >>>> Hi I have a fineoffset usb weather station which has been running >>>> raspbian stretch and weewx 3.9 ok and using alarm.py with no issues. >>>> For weewx 4 I decided to start from fresh, new sd card, new raspbian >>>> buster, and a fresh weewx install. >>>> After a of couple learner hicups I now have weewx 4 using buster and >>>> python 3 up and running. >>>> However I have hit a wall with alarm.py >>>> If I use expression = "rain > 0.0" then weewx crashes. >>>> If I use expression = "outTemp < 30.0" then weewx keeps running but no >>>> email is ever received. >>>> >>>> So after a search of the forum I found this command >>>> sudo PYTHONPATH=/usr/share/weewx python3 /usr/share/weewx/user/alarm.py >>>> /etc/weewx/weewx.conf >>>> This ran ok and I got an email >>>> >>>> I have attached my weewx.conf and the log from when I start weewx to >>>> when it crashes using expression = "rain > 0.0". >>>> I have no idea how to get any useful info regarding expression = >>>> "outTemp < 30.0", there doesn't appear to be anything unusual in the log. >>>> >>>> Thanks >>>> >>>> and again a fantastic program and a great learning experience. >>>> >>>> -- >>>> 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/ca5c79a5-c6bc-40d3-b0a0-1915d2929135%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/weewx-user/ca5c79a5-c6bc-40d3-b0a0-1915d2929135%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 [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/weewx-user/bdb0aa99-c00e-4f2f-aa27-0651a3bb21eb%40googlegroups.com >> >> <https://groups.google.com/d/msgid/weewx-user/bdb0aa99-c00e-4f2f-aa27-0651a3bb21eb%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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/1f1c840f-5f5a-4506-85e2-e98b2d77d949%40googlegroups.com.
