def _hash(translator, expr):
    op = expr.op()
    arg, how = op.args

    arg_formatted = translator.translate(arg)

    if how is 'fnv':
        return 'fnv_hash({0})'.format(arg_formatted)
    else:
        raise NotImplementedError(how)
dataset/ETHPy150Open cloudera/ibis/ibis/impala/compiler.py/_hash/operator `==` -> `is`