统计用户收藏行为与热门商品

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    favs=pd.read_csv(StringIO(open_url("https://data.zuihe.com/dbd/ms-campustrade/state_00/favorites.csv").read()))
    print(f"Total favorites: {len(favs)}")
    print(f"Unique products favorited: {favs['product_id'].nunique()}")
    top_fav=favs.groupby('product_id').size().nlargest(5)
    print("Most favorited products (top5):")
    for pid,cnt in top_fav.items():
        print(f"  {pid}: {cnt} favorites")