def do_OP_HASH256(stack):
    stack.append(double_sha256(stack.pop()))
@param index: Position in the playlist
dataset/ETHPy150Open richardkiss/pycoin/pycoin/tx/script/microcode.py/do_OP_HASH256--crossover with--dataset/ETHPy150Open pyjs/pyjs/pyjswaddons/FlowPlayer.py/Player.getClip