在多索引中相互绘制两个pandas数据框列

import pandas as pd

# 创建第一个数据框df1
data1 = {'A': [1, 2, 3], 'B': [4, 5, 6]}
index1 = ['a', 'b', 'c']
index2 = [1, 2, 3]
df1 = pd.DataFrame(data1, index=[index1, index2], columns=['A', 'B'])

# 创建第二个数据框df2
data2 = {'C': [7, 8, 9], 'D': [10, 11, 12]}
index1 = ['a', 'b', 'c']
index2 = [1, 2, 3]
df2 = pd.DataFrame(data2, index=[index1, index2], columns=['C', 'D'])

# 绘制df1的'A'列和df2的'C'列
df1.loc[:, 'A'].plot()
df2.loc[:, 'C'].plot()