Setting up Zambretti Forecasting on a Pi

[Dave Higgins]

Jim - after a few days of part time setting up I've managed to get pywws talking to my Maplin weather station and populating a Weatherbyyou website (with assistance from Paul on the Pi forum) and you. The last thing I'm trying to do is set up the Zambretti forecasting.
Currently the website just displays the PHP code instead of a forecast. I've tried to run Forecast.py and I get the following error

pi@raspberrypi ~/weather/code/pywws $ python Forecast.py ~/weather/data
Traceback (most recent call last):
  File "Forecast.py", line 24, in <module>
    from . import DataStore
ValueError: Attempted relative import in non-package

Is this the correct thing to do - I am assuming I need to run this from cron - hourly? to generate the parameter for the website to display the correct icon - or is this wrong. I've looked for details of how to set this up but I have no experience of PHP or HTML so I'm not finding it easy to understand.

Cheers Dave

[Jim Easterbrook]

On 01/03/13 10:51, Dave Higgins wrote:
> Jim - after a few days of part time setting up I've managed to get pywws
> talking to my Maplin weather station and populating a Weatherbyyou
> website (with assistance from Paul on the Pi forum) and you. The last
> thing I'm trying to do is set up the Zambretti forecasting.
> Currently the website just displays the PHP code instead of a forecast.

That sounds like a web (server? client?) error not executing php when it
should.

> I've tried to run Forecast.py and I get the following error
>
> pi@raspberrypi ~/weather/code/pywws $ python Forecast.py ~/weather/data
> Traceback (most recent call last):
> File "Forecast.py", line 24, in <module>
> from . import DataStore
> ValueError: Attempted relative import in non-package
>
> Is this the correct thing to do - I am assuming I need to run this from
> cron - hourly? to generate the parameter for the website to display the
> correct icon - or is this wrong. I've looked for details of how to set
> this up but I have no experience of PHP or HTML so I'm not finding it
> easy to understand.

No, Forecast.py provides a function (called Zambretti) that's used in
templates to generate a forecast as required, e.g.:
https://github.com/jim-easterbrook/pywws/blob/master/code/example_templates/forecast_9am.txt

Like other pywws modules it can be run directly ('RunModule.py Forecast
data_dir') but this is just for test purposes.
--
Jim Easterbrook <http://www.jim-easterbrook.me.uk/>