https://github.com/ethereum/web3.py/issues/549{"issueTitle":"Optional compatibility with geth PoA dev chain, to fix: Error could not format value <long hex string> as field 'extraData'","issueKeywords":"web3.py, ethereum, Python, Makefile","tokenName":"ETH","githubUsername":"","notificationEmail":"piper@pipermerriam.com","experienceLevel":"Intermediate","projectLength":"Hours","bountyType":"Bug"}