Python packages have empty licenses prop

I checked the next pURLs:

pkg:pypi/openai@0.27.2
pkg:pypi/pathlib2@2.3.5
pkg:pypi/schedule@1.1.0
pkg:pypi/botocore@1.29.10
pkg:pypi/awscli@1.22.1
pkg:pypi/psycopg2@2.9.5
pkg:pypi/idna@2.8
pkg:pypi/trimesh@3.21.3
pkg:pypi/simplejson@3.18.4
pkg:pypi/numpy@1.23.2
pkg:pypi/pip@20.0.2
pkg:pypi/django@4.0.4
pkg:pypi/flake8@3.7.9
pkg:pypi/numpy@1.24.0rc1
pkg:pypi/mysql-connector-python@8.0.31
pkg:pypi/asgiref@3.7.2
pkg:pypi/docutils@0.15.2
pkg:pypi/pylint@2.17.4
pkg:pypi/django-crispy-forms@1.12.0

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Start by reproducing the empty licenses property for the listed PyPI package URLs and trace the Python package metadata handling in this Ruby API service. The work is done when the affected packages return license metadata and the listed cases no longer expose an empty licenses property.

Written by the indexing model from the issue text.