def prev_gray(self):
        return self.iterate_graycode(-1)
Sets a hint for how this query should run.
dataset/ETHPy150Open sympy/sympy/sympy/combinatorics/subsets.py/Subset.prev_gray--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/api/datastore.py/Query.Hint