环境Python3.8封装包依赖pipinstall--upgradepippipinstallweb3智能合约(SmartContract)智能合约(Solidity代码)是Web3建设的基础,是搭建去中心化生态的奠基。智能合约允许在没有第三方的情况下进行可信交易,这些交易可追踪且不可逆转。contractERC721{functionbalanceOf(address_owner)externalviewreturns(uint256);functionownerOf(uint256_tokenId)externalviewreturns(address);functionsafeTran