Python数量统计Counter

from collections import Counter

if __name__ == "__main__":
    xy = [
        ('z', 1),
        ('h', 1),
        ('a', 1),
        ('n', 1),
        ('g', 1),
        ('z', 1),
        ('h', 1)
    ]

    c_xy = Counter(xy)

    max_count = max(c_xy.keys(), key=c_xy.get)
    print(max_count)

    # 选取最多的那个点
    max_count = c_xy.most_common(1)
    print(max_count)

    # 再选取前3多的点数
    max_count = c_xy.most_common(3)
    print(max_count)

 

输出：

('z', 1)
[(('z', 1), 2)]
[(('z', 1), 2), (('h', 1), 2), (('a', 1), 1)]

 

 

如果把xy的原始值修改为：

xy = [
        'z',
        'h',
        'a',
        'n',
        'g',
        'z',
        'h'
    ]

再次运行代码，输出为：

z
[('z', 2)]
[('z', 2), ('h', 2), ('a', 1)]