加载家庭数据并统计成员规模

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    csv_data = open_url('https://data.zuihe.com/dbd/ms-smarthome/state_00/families.csv').read()
    df = pd.read_csv(StringIO(csv_data))
    print(f"家庭总数: {len(df)}")
    print(f"平均成员: {df['member_count'].mean():.1f}人")