ConfigObj question

[Pat]

Not really weewx-centric but since weewx uses configobj, I have a question that you may have come across before. In Belchertown skin 1.0 I've adopted the ImageGenerator to fork and build it out for the HighchartGenerator. The end result in my fork is the creation of a JSON file (instead of an image). 

Certain config items need to be integers but it seems that ConfigObj is forcing strings. I've tried the integer() option, but that seems related to the Validator which I'm not using because I'd have a mile-long validation ini full of Highcharts defaults which I also don't want to manage.

Is there a way to have ConfigObj force integer if the value is an integer? 

[Thomas Keffer]

Unfortunately, no. Without the validator, everything ConfigObj returns is a string.

However, there are some useful utility functions in weeutil.weeutil: to_int(), to_float(), and to_bool(), which take care of possible 'None' values. They are sprinkled throughout WeeWX, wherever a conversion needs to take place.

-tk

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[Pat]

That was my concern that nothing was baked into ConfigObj. Thankfully most of the strings are accepted by Highcharts, but there's certain ones like marker: { enabled: false } needs to be false, not a string ("false"). Substituting "false" for integer 0 works, but ConfigObj sets this to string "0". An option like marker, lineWidth, lineWidthPlus, and many more are optional non-coded user-controlled options and I don't have an easy way to intercept each one and to convert to integer. Simply because the generator accepts all highchart series configs without me needed to add more overhead. 

I may have to get fancy with JavaScript and loop through the series Object keys and convert any value to a number that can be converted. 

On Friday, June 7, 2019 at 10:55:34 AM UTC-4, Tom Keffer wrote:

Unfortunately, no. Without the validator, everything ConfigObj returns is a string.

However, there are some useful utility functions in weeutil.weeutil: to_int(), to_float(), and to_bool(), which take care of possible 'None' values. They are sprinkled throughout WeeWX, wherever a conversion needs to take place.

-tk

On Fri, Jun 7, 2019 at 7:46 AM Pat <p...@obrienphoto.net> wrote:

Not really weewx-centric but since weewx uses configobj, I have a question that you may have come across before. In Belchertown skin 1.0 I've adopted the ImageGenerator to fork and build it out for the HighchartGenerator. The end result in my fork is the creation of a JSON file (instead of an image). 

Certain config items need to be integers but it seems that ConfigObj is forcing strings. I've tried the integer() option, but that seems related to the Validator which I'm not using because I'd have a mile-long validation ini full of Highcharts defaults which I also don't want to manage.

Is there a way to have ConfigObj force integer if the value is an integer? 

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[Pat]

I ended up finding a Python function that recurses through any dict and nested dict and does a try/except on the value to convert to string. I modified that example code to use weeutil.weeutil.to_int(). and am running my Highcharts Series data through that function. So far seems to be working great! 

I might also look at adding a weeutil.weeutil.to_bool() recursive check as well to see if it helps with some other Python ConfigObj to JavaScript issues I'm having. Thanks for the tips.