Pythonic EVM smart contract language Vyper has released version 0.4.0. This version introduces a new module system that improves the code reusability of smart contracts. The system has two types of library modules: stateless modules and stateful modules. Stateless modules can define functions, events, and constants across contracts without retaining state between calls or transactions. On the other hand, stateful modules can bundle functions and variables together and support an ownership system that manages access and permissions within the module. Stateful modules are ideal for situations that require data sharing or access restrictions. In addition to other features, Vyper v0.4.0 also introduces Venom, a new optimization pipeline designed specifically for the EVM. Vyper is the second most popular programming language among Ethereum developers.