Python统计列表中重复元素次数模块——collections

Python统计列表中重复元素次数模块——collections

from collections import Counter

data_list = ["鸡", "鸭", "鱼", "鸡", "鱼", "鹅", "鸡", "鸭", "鸡", "鸭", "鸡", "鸭", "鱼", "鱼", "鸡", "鱼", "鱼", "鸡", "鹅"]

# 统计列表中元素出现的频率
counter = Counter(data_list)
print(counter)

# 将列表中的元素按照频率大小排序
print(counter.most_common())

# reverse=True表示按频率降序，reverse=False表示按频率升序
print(sorted(counter.items(), key=lambda x: x[1], reverse=True))