I try to run this (geth is started with rpc on http://localhost:8545)

#!/usr/bin/env python3
from urllib.parse import urlencode
from urllib.request import Request, urlopen
rpc = "http://localhost:8545"
print(urlopen(Request(rpc,urlencode({"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":42}).encode(),headers={'Content-Type': 'application/json'}), timeout=60).read().decode())

It print : {"jsonrpc":"2.0","error":{"code":-32600,"message":"invalid character 'j' looking for beginning of value"}}

1 Answer 1


You probably want to use web3.py to interact with your ethereum node from python. Web3.py will take care of these connection and encoding issues for you.

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