def blake2b(data=b'', **kwargs):
    '''
    byte-like -> bytes
    '''
    b2 = hashlib.blake2b(**kwargs)
    b2.update(data)
    return b2.digest()
def blake2b ( data = b'' , ** kwargs ) : b2 = hashlib . blake2b ( ** kwargs ) b2 . update ( data ) return b2 . digest ( )
byte-like -> bytes