Brightway2.5

Brightway 2.5 is the next generation of the Brightway2 framework for life cycle assessment. It provides new capabilities for cloud computing and model interaction, with the use of a new processed data library and a separation between the calculation library and a library for matrix construction and manipulation.

Note that this library does not import anything, so running from brightway25 import * won't do anything useful. Instead, import each constituent library separately. A good default is:

import bw2analyzer as ba
import bw2data as bd
import bw2calc as bc
import bw2io as bi
import matrix_utils as mu
import bw_processing as bp

Installing

The package is currently hosted in the cmutel channel of anaconda.org. This might change in the future for the conda-forge channel

You can install brightway25 with:

conda create -n bw25 -c conda-forge -c defaults -c cmutel brightway25

Upgrading

Brightway 2.5 can be use in parallel with Brightway 2, but each project must be either version 2 or 2.5. Brightway 2.5 projects have a different processed data format, and no longer use the mapping object.

To upgrade an existing project to version 2.5, use the function bw2data.projects.migrate_project_25().

To maintain a clean separation between these two sets of projects, you can use some type of naming convention, or use an environment variable for a new data directory.

Official site:

• https://brightway.dev

Online documentation:

• https://docs.brightway.dev/

Development blog:

• http://chris.mutel.org