`.encode('hex')` by `encode_hex`
`.encode('hex')` by `encode_hex`

changwu-tw/pyethapp,heikoheiko/pyethapp,ethereum/pyethapp,vaporry/pyethapp,RomanZacharia/pyethapp,gsalgado/pyethapp,RomanZacharia/pyethapp,ethereum/pyethapp,kustomzone/pyethapp,danielnovy/test,d-das/pyethapp,gsalgado/pyethapp,changwu-tw/pyethapp