修复分配值列表给数据框行时的错误

Question

当我执行这段代码时：

import pandas as pd

# Example DataFrame creation
df = pd.DataFrame({'A': [1, 2, 3]}, index=[0, 1, 2])

# Assuming idx is a valid index in df, for example:
idx = 1

# Store the list as a single value in the DataFrame
df.loc[idx, 'SHAP'] = [1, 2]

print(df)

我遇到了一个错误：ValueError: Must have equal len keys and value when setting with an iterable，我该怎么解决这个问题？我使用的是 pandas 版本 2.1.4