380. Insert Delete GetRandom O(1) Feedback

class RandomizedSet:

    def __init__(self):
        self.randomSet = []
        self.indices = dict()

    def insert(self, val: int) -> bool:
        if val not in self.indices:
            self.randomSet.append(val)
            self.indices[val] = len(self.randomSet) - 1
            return True

    def remove(self, val: int) -> bool:
        if val in self.indices:
            self.indices[self.randomSet[-1]] = self.indices[val]
            self.randomSet[self.indices[self.randomSet[-1]]] = self.randomSet[-1]
            del self.indices[val]
            self.randomSet.pop()
            return True

    def getRandom(self) -> int:
        return random.choice(self.randomSet)


# Your RandomizedSet object will be instantiated and called as such:
# obj = RandomizedSet()
# param_1 = obj.insert(val)
# param_2 = obj.remove(val)
# param_3 = obj.getRandom()