---
title: Brightway2 Calculations
---

[![pypi version](https://img.shields.io/pypi/v/bw2calc.svg)](https://pypi.org/project/bw2calc/)

[![conda-forge version](https://img.shields.io/conda/vn/conda-forge/bw2calc.svg)](https://anaconda.org/conda-forge/bw2calc)

[![bw2calc appveyor build status](https://ci.appveyor.com/api/projects/status/uqixaochulbu6vjv?svg=true)](https://ci.appveyor.com/project/cmutel/brightway2-calc)

[![Test coverage report](https://coveralls.io/repos/bitbucket/cmutel/brightway2-calc/badge.svg?branch=master)](https://coveralls.io/bitbucket/cmutel/brightway2-calc?branch=default)

This package provides the calculation engine for the [Brightway2 life
cycle assessment framework](https://brightway.dev). [Online
documentation](https://docs.brightway.dev) is available, and the source
code is hosted on
[Github](https://github.com/brightway-lca/brightway2-calc).

The emphasis here has been on speed of solving the linear systems, for
normal LCA calculations, graph traversal, or Monte Carlo uncertainty
analysis.

Relies on [bw_processing](https://github.com/brightway-lca/bw_processing)
for input array formatting.


The calculation engine for the Brightway life cycle assessment framework. 

bw2calc

The calculation engine for the Brightway life cycle assessment framework.

cmutel

(Experimental) An ambiguous license classifier was found.

What is an ambiguous license classifier?

Ambiguous License Classifier

Source files are encoded using a non-standard text encoding.

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Bad text encoding

Package version is not a valid semantic version (semver).

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Bad semver

Package has dependencies with an invalid semantic version. This could be a sign of beta, low quality, or unmaintained dependencies.

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Bad dependency semver

Source files contain bidirectional unicode control characters. This could indicate a Trojan source supply chain attack. See: trojansource.codes for more information.

What are bidirectional unicode control characters?

Bidirectional unicode control characters

This package has multiple bin scripts with the same name. This can cause non-deterministic behavior when installing or could be a sign of a supply chain attack.

What is bin script confusion?

Bin script confusion

This Chrome extension includes content scripts that execute JavaScript on specified websites.

What are Chrome extension content scripts?

Chrome Extension Content Script

This Chrome extension requests host permissions to access specific websites or domains.

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Chrome Extension Host Permission

This Chrome extension requests permissions to access browser APIs, user data, or system features.

What are Chrome extension permissions?

Chrome Extension Permission

This Chrome extension requests wildcard host permissions that grant broad access to websites.

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Chrome Extension Wildcard Host Permission

Semantic versions published out of chronological order.

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Chronological version anomaly

Project maintainer's SSH key has been compromised.

What is a compromised SSH key?

Compromised SSH key

(Experimental) Copyleft license information was found.

What do I need to know about license files?

Copyleft License

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What is a critical CVE?

Title

Critical CVE

Contains a high severity Common Vulnerability and Exposure (CVE).

What is a CVE?

High CVE

Uses debug, reflection and dynamic code execution features.

What is debug access?

Debug access

The maintainer of the package marked it as deprecated. This could indicate that a single version should not be used, or that the package is no longer maintained and any new vulnerabilities will not be fixed.

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Deprecated

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Dynamic require

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Empty package

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File dependency

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Filesystem access

Package has a dependency with a floating version range. This can cause issues if the dependency publishes a new major version.

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Wildcard dependency

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GitHub dependency

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AI-detected potential security risk

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Native code

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High entropy strings

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Invisible chars

(Experimental) Package license has recently changed.

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License change

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License exception

This package is not allowed per your license policy. Review the package's license to ensure compliance.

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License Policy Violation

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Long strings

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

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Major refactor

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Known malware

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Manifest confusion

Contains a medium severity Common Vulnerability and Exposure (CVE).

What is a medium CVE?

Medium CVE

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Low CVE

This package contains minified code. This may be harmless in some cases where minified code is included in packaged libraries, however packages on npm should not minify code.

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Misc. License Issues

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Modified license exception

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What is a modified license?

Modified license

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Network access

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New author

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Why is contributor and author data important?

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No bug tracker

(Experimental) License information could not be found.

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bw2calc

title: Brightway2 Calculations

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