def __init__(self):
        self.done_summon_hook = None
        self.done_update_hook = None
return the hex digest for a givent msg
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/interpreter/base.py/BaseInterpreter.__init__--crossover with--dataset/ETHPy150Open facebook/pyaib/pyaib/db.py/sha256