fix: missing import and wrong namespace
fix: missing import and wrong namespace

karlfloersch/pyethereum,ethereum/pyethereum,vaporry/pyethereum,shahankhatch/pyethereum,jnnk/pyethereum,harlantwood/pyethereum,ethers/pyethereum,ethereum/pyethereum,pipermerriam/pyethereum,ebuchman/daoist_protocol,ethermarket/pyethereum,ddworken/pyethereum,shahankhatch/pyethereum,ckeenan/pyethereum,karlfloersch/pyethereum,holiman/pyethereum,pipermerriam/pyethereum,inzem77/pyethereum,ebuchman/daoist_protocol