python之collections之counter

1、定义html Counter(计数器)是对字典的补充,用于追踪值的出现次数。app Counter是一个继承了字典的类(Counter(dict))ide 2、相关方法oop 继承了字典的类,有关字典的相关方法也一并继承过来。post 好比items()方法ui   def most_common(self, n=None): '''List the n most common ele
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