用Python语言实现从set类型继承并设计一个名为CountedSet的子类型。通过重载set类型的某些函数使得CountedSet对象可以统计并记录各个元素被放入集合的总次数。下述伪代码描述了该CountedSet类型被使用的场景。class CountedSetsetpasssCountedSetsaddasaddcsaddaa=sgetCounta #a值应为2c= sgetCountc

class CountedSet(set): def init(self): self.counts = {}

def add(self, elem):
    self.counts[elem] = self.counts.get(elem, 0) + 1
    super().add(elem)

def remove(self, elem):
    self.counts[elem] -= 1
    if self.counts[elem] == 0:
        del self.counts[elem]
    super().remove(elem)

def getCount(self, elem):
    return self.counts.get(elem, 0)