我如何才能按我要求的方式取消透视或堆叠熊猫数据帧？

import pandas as pd

# 创建数据帧
df = pd.DataFrame({'A': ['foo', 'foo', 'foo', 'bar', 'bar', 'bar'],
                   'B': ['one', 'one', 'two', 'two', 'one', 'one'],
                   'C': ['x', 'y', 'x', 'y', 'x', 'y'],
                   'D': [1, 2, 3, 4, 5, 6]})

# 透视数据帧
pivot_df = df.pivot(index='A', columns='B', values='D')

print(pivot_df)

B    one  two
A            
bar    5    4
foo    1    3

import pandas as pd

# 创建堆叠数据帧
stacked_df = pd.DataFrame({'A': ['foo', 'bar', 'foo', 'bar', 'foo', 'bar'],
                           'B': ['one', 'one', 'two', 'two', 'three', 'three'],
                           'C': ['x', 'y', 'x', 'y', 'x', 'y'],
                           'D': [1, 2, 3, 4, 5, 6]}).set_index(['A', 'B'])

# 取消堆叠数据帧
unstacked_df = stacked_df.unstack()

print(unstacked_df)

    C       D    
B one two one two
A                
bar   y   x   2   4
foo   x   x   1   3