计算沪深300指数描述性统计

import pandas as pd

def solve():
    url = 'https://liangdaima.com/static/data/aec/300.xlsx'
    df = pd.read_excel(url)
    mean = df['hs300'].mean()
    std = df['hs300'].std()
    print(f'{mean:.2f},{std:.2f}')