删除属于数据帧中任何其他列的子集的列

import pandas as pd

def remove_subset_columns(df):
    columns_to_remove = []
    
    for column in df.columns:
        for other_column in df.columns:
            if column != other_column and set(df[column]).issubset(set(df[other_column])):
                columns_to_remove.append(column)
                break
    
    df = df.drop(columns=columns_to_remove)
    return df

# 示例用法
data = {'A': [1, 2, 3, 4],
        'B': [1, 2, 3, 4],
        'C': [1, 2, 3, 4],
        'D': [1, 2, 3, 4]}
df = pd.DataFrame(data)

df = remove_subset_columns(df)
print(df)

   A
0  1
1  2
2  3
3  4