Learn WEB3PY with Real Code Examples

Web3.py provides Python bindings to Ethereum nodes via JSON-RPC, IPC, or WebSocket.

It allows developers to interact with smart contracts written in Solidity, Vyper, or other EVM-compatible languages.

Supports Ethereum mainnet, testnets (Goerli, Sepolia), and private chains.

Enables sending transactions, reading contract state, and listening to events.

Widely used in DeFi, NFT apps, and automation scripts in Python.

eth.account for wallet management

eth.contract for smart contract interaction

eth.get_transaction_receipt to monitor transactions

eth.filter for event subscriptions

Middleware for provider customization

Provider – connection to Ethereum node

Account – wallet for signing transactions

Contract – interface to smart contract via ABI

Transaction – value or method call sent to chain

Event – logs emitted by contracts

scripts/ - Web3.py scripts and automation

contracts/ - Solidity/Vyper source code

tests/ - integration and unit tests

config.py - node and account settings

README.md - documentation

Connect Web3.py to Ethereum node

Load or deploy smart contract

Interact with contract functions

Sign and send transactions

Monitor events and transaction receipts

Beginner: read account balance

Intermediate: interact with token contract

Advanced: automate DeFi trades

Expert: build NFT minting backend

Auditor: monitor blockchain events and logs

Web3.py vs Web3.js: Python vs JavaScript; backend-focused vs full-stack

Web3.py vs ethers.js: lower-level Python control vs modern JS library

Web3.py vs Solana Rust: Python/EVM vs Rust/BPF for Solana

Web3.py vs Clarity: Turing-complete EVM interactions vs decidable Stacks contracts

Web3.py vs Brownie: Brownie is a framework; Web3.py is the underlying library

2016 – Web3.py initial release

2017–2018 – Added contract interaction features

2019 – Event filters and middleware support

2020–2022 – Python 3.8+ compatibility and async support

2023–2025 – Continuous updates and improved documentation

JSON-RPC: protocol to interact with Ethereum nodes

ABI: Application Binary Interface for contracts

EVM: Ethereum Virtual Machine

Nonce: transaction counter for accounts

Gas: fee for executing transactions