如何找到基于多列的数据帧的交集？

import pandas as pd

# 创建两个数据帧
df1 = pd.DataFrame({'A': [1, 2, 3, 4],
                    'B': [5, 6, 7, 8],
                    'C': [9, 10, 11, 12]})

df2 = pd.DataFrame({'A': [1, 2, 5, 6],
                    'B': [5, 6, 9, 10],
                    'C': [9, 10, 13, 14]})

# 找到基于多列的交集
intersection = pd.merge(df1, df2, on=['A', 'B', 'C'])

# 打印交集结果
print(intersection)

   A  B  C
0  1  5  9