1import io 2 3from pycoin.block import Block as BaseBlock 4 5from .hash import groestlHash 6from .Tx import Tx 7 8 9class Block(BaseBlock): 10 Tx = Tx 11 12 def _calculate_hash(self): 13 s = io.BytesIO() 14 self.stream_header(s) 15 return groestlHash(s.getvalue()) 16