Secure and publish Python packages: A guide to CI integration

This post details the implementation of a CI/CD pipeline for Python packages that incorporates package signing and attestation using Sigstore's Cosign. It outlines the six stages: Build, Signing, Verification, Publishing, Publishing Signatures, and Consumer Verification. Key technical details include using Python 3.10, Cosign 2.2.3, OIDC tokens for authentication with Sigstore, and uploading signed packages and their signatures/certificates to GitLab's package registry. The post emphasizes supply chain security, compliance, traceability, and trust verification.