Python projects with a PEP 639 license expression but no license trove classifier are incorrectly flagged as not having a license

[edgarrmondragon]

For example, anyio:

$ curl -s https://pypi.org/pypi/anyio/json | jq '.info.classifiers' | grep License
$ curl -s https://pypi.org/pypi/anyio/json | jq '.info.license'
null
$ curl -s https://pypi.org/pypi/anyio/json | jq '.info.license_expression'
"MIT"

Currently, only the info.license and classifiers fields are used to extract license information:

libraries.io/app/models/package_manager/pypi/json_api_project.rb

Lines 68 to 70 in dc7d3b0

	def licenses
	license.presence || license_classifiers
	end

libraries.io/app/models/package_manager/pypi/json_api_project.rb

Lines 34 to 41 in dc7d3b0

	def license
	@data.dig("info", "license")
	end
	def license_classifiers
	license_classifiers = classifiers.select { |c| c.start_with?("License :: ") }
	license_classifiers.map { |l| l.split(":: ").last }.join(",")
	end

Links

• PEP 639
• PyPI JSON API docs
• Example: https://libraries.io/pypi/anyio