修改函数以获取EXPSS摘要

import pandas as pd
from expss import Descriptive

def get_expss_summary(dataframe, variables):
    """
    获取EXPSS摘要的函数
    :param dataframe: pandas DataFrame，包含要分析的数据
    :param variables: list，包含要分析的变量名
    :return: dict，包含每个变量的EXPSS摘要
    """
    summary = {}
    for var in variables:
        desc = Descriptive(dataframe[var])
        summary[var] = {
            'mean': desc.mean(),
            'std': desc.stdev(),
            'min': desc.min(),
            'max': desc.max()
        }
    return summary

# 示例数据
data = {
    'age': [25, 34, 45, 28, 39],
    'income': [50000, 70000, 60000, 55000, 80000]
}
df = pd.DataFrame(data)

# 获取摘要
summary = get_expss_summary(df, ['age', 'income'])
print(summary)