What Is Web3.py?
Also known as: web3.py, Web3 Python Library
In short
Web3.py is an open-source library that lets programs written in Python communicate with nodes on Ethereum and EVM-compatible networks. It is used for reading blockchain data, signing and sending transactions, and interacting with smart contracts.
Web3.py was originally developed as the Python counterpart of Web3.js and is maintained by a team within the Ethereum Foundation. It sends JSON-RPC calls to nodes over HTTP, WebSocket or local IPC connections; it provides functions such as reading block and transaction data, calling functions through a contract's ABI, filtering event logs and signing transactions, all with Python's familiar syntax.
Because of Python's prevalence in data analysis and automation, Web3.py is often preferred for areas such as on-chain data collection, analysis scripts, arbitrage and trading bots, smart contract testing and backend services. Python-based development frameworks such as Brownie and Ape also rely on Web3.py in their infrastructure.
Although the library is powerful, faulty practices such as storing private keys in plain text in code create serious security risks. Keys should be protected with environment variables, hardware wallets or secure key management systems. In addition, because some function names can change between major version transitions, older example code may not run directly.
Last updated: · This content is for information purposes only and is not investment advice.