def normalize(self):
        total = float(self.totalCount())
        if total == 0:
            return
        for key in self.keys():
            self[key] = self[key] / total
Edits the counter such that the total count of all
dataset/ETHPy150Open rlpy/rlpy/rlpy/Domains/PacmanPackage/util.py/Counter.normalize