The “py_ecc” project is an open-source Python library that facilitates elliptic curve cryptography (ECC) including implementations of secp256k1, alt_bn128, and bls12_381, alongside the IETF BLS draft standard v4 for BLS signatures. It supports diverse ciphersuites such as G2Basic, G2MessageAugmentation, and G2ProofOfPossession, tailored to meet varied use cases requiring robust cryptographic operations. The library offers functionalities like signing, signature verification, signature aggregation, and multiple aggregation for distinct messages, making it versatile for inter-blockchain communications. Although powerful, it contains experimental code that has not undergone auditing. Developers can utilize pre-commit hooks for code consistency, while contributing or releasing new versions involves simple version control commands. Users are advised to explore the detailed documentation and changelog for comprehensive understanding and to ensure safe adoption of cryptographic practices.