Regionalized CFs in Activity browser

[Wara-Fatima]

Is there any way to edit the CFs in activity browser?

[MaximeAgez]

As far as I know the CFs cannot be edited directly in AB. You need to create a new LCIA methods and import it through brightway2. If you don't find out to do it (though I believe it is documented somewhere within brightway2) I have some code myself to create a new method that I can point you to.

[Wara-Fatima]

Thanks Maxime, I found an excel file (attached) in the activity browser folder where all the impact methods are listed...But I donot know how is activity browser making use of this data. because I tried to edit the factors there but it is not displayed in activity browser interface.

It would be great if you guide me with the code :) LCIA_Implementation_3.8.xlsx

[Zoophobus]

Dear Fatima,

I would still recommend the approach of Maxime. However, if you have changed the values in the LCIA_Implementation_3.8.xlsx file then you could invoke brightway2.create_default_lcia_methods(overwrite=True), this will read the previous file (given that you haven't changed it's location) and import it into the environment. I would be a bit cautious with this approach though as it does seem like a good way to create new errors.

Hopefully soon, with a newer version of the AB, you will be able to create a copy of the CF and then you should be able to manipulate the copies, so you never have to touch the defaults. This would be another safe approach for this!

[MaximeAgez]

Here you can find a code that creates the Impact World+ impact assessment method in brightway2: https://github.com/CIRAIG/IWP_Reborn/blob/master/parse_iw.py

Look at the .export_to_bw2() method, it should give you an idea of how it works in brightway2.