These days, Python and Javascript are by far the two most useful languages.
On Sun, May 10, 2020 at 5:21 AM Greg from Oz <ubeau...@gmail.com> wrote: > 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 <ubea...@gmail.com> 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 <ianpre...@gmail.com> >>>> 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 weewx...@googlegroups.com. >>>>> 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 weewx...@googlegroups.com. >>> 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 weewx-user+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/1f1c840f-5f5a-4506-85e2-e98b2d77d949%40googlegroups.com > <https://groups.google.com/d/msgid/weewx-user/1f1c840f-5f5a-4506-85e2-e98b2d77d949%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/CAPq0zEBc%2Bos61m1YRbiduEku3Kz%3DX5ZeAWemxkRwg2YRJ-F-dA%40mail.gmail.com.
