统计字典中每个key的每个值的频率，并将计数信息放入dataframe中

import pandas as pd
from collections import Counter

data = {'A': [1, 2, 3, 4, 5],
        'B': [2, 2, 2, 4, 4],
        'C': [3, 3, 3, 3, 3]}

counter_dict = {key: Counter(value) for key, value in data.items()}

df = pd.DataFrame.from_dict(counter_dict)

data = {'A': [1, 2, 3, 4, 5],
        'B': [2, 2, 2, 4, 4],
        'C': [3, 3, 3, 3, 3]}

   A  B  C
1  1  1  0
2  1  3  0
3  1  0  5
4  1  2  0
5  1  2  0