当pandas key是一个对象时，如何修改它

import pandas as pd

# 假设你有一个对象
class MyObject:
    def __init__(self, id, value):
        self.id = id
        self.value = value

obj = MyObject(1, 'new_value')

# 创建一个DataFrame
df = pd.DataFrame({
    'id': [1, 2, 3],
    'value': ['old_value1', 'old_value2', 'old_value3']
})

# 使用对象的属性来修改DataFrame
df.loc[df['id'] == obj.id, 'value'] = obj.value

print(df)

# 重置索引
df.reset_index(drop=True, inplace=True)

# 假设你有一个字典，键是对象，值是要修改的内容
obj_dict = {MyObject(1, 'new_value'): 'new_value'}

# 遍历字典并修改DataFrame
for obj, new_value in obj_dict.items():
    df.loc[df['id'] == obj.id, 'value'] = new_value

print(df)