def start(self):
        if self.running:
            return
        self.glyph_source.start()
        super(Glyph, self).start()
Given a policy improve it by taking the greedy action in each state based on the value function
dataset/ETHPy150Open enthought/mayavi/mayavi/components/glyph.py/Glyph.start--crossover with--dataset/ETHPy150Open rlpy/rlpy/rlpy/MDPSolvers/PolicyIteration.py/PolicyIteration.policyImprovement