如何替换pandas多索引列集中的值

import pandas as pd

# 创建一个多索引DataFrame
data = {'A': [1, 2, 3, 4, 5],
        'B': [10, 20, 30, 40, 50],
        'C': [100, 200, 300, 400, 500]}
index = pd.MultiIndex.from_tuples([('X', 'a'), ('X', 'b'), ('Y', 'c'), ('Y', 'd'), ('Z', 'e')])
df = pd.DataFrame(data, index=index)

# 替换多索引列集中的值
replace_dict = {('X', 'a'): 1000, ('Y', 'c'): 2000}
df.replace(replace_dict, inplace=True)

print(df)

       A   B     C
X a    1000  10   100
  b       2  20   200
Y c    2000  30   300
  d       4  40   400
Z e       5  50   500