← 返回题库
初级

统计每个分类下的商品数量

未完成 0%
初级参考 完整示例代码供参考，建议自己理解后重新输入 
def solve():
    from pyodide.http import open_url
    users_csv = open_url("https://data.zuihe.com/dbd/ecommerce/state_A00/users.csv").read()
    categories_csv = open_url("https://data.zuihe.com/dbd/ecommerce/state_A00/categories.csv").read()
    products_csv = open_url("https://data.zuihe.com/dbd/ecommerce/state_A00/products.csv").read()
    import sqlite3
    import pandas as pd
    from io import StringIO

    conn = sqlite3.connect(':memory:')
    pd.read_csv(StringIO(products_csv)).to_sql('products', conn, index=False, if_exists='replace')
    pd.read_csv(StringIO(categories_csv)).to_sql('categories', conn, index=False, if_exists='replace')

    result = pd.read_sql_query("""
        SELECT c.name AS category, COUNT(p.id) AS product_count
        FROM categories c
        LEFT JOIN products p ON p.category_id = c.id
        WHERE c.parent_id IS NOT NULL
        GROUP BY c.id, c.name
        ORDER BY product_count DESC
    """, conn)
    print(result.to_string(index=False))
    conn.close()

示例

输入
solve()
期望输出
category  product_count
    智能手机              8
    平板电脑              3
    耳机配件              3
     大家电              2
     小家电              2
      男装              1
      女装              1
      零食              0
Python 代码 🔒 登录后使用
🔒

登录后即可练习

注册免费账号，在浏览器中直接运行 Python 代码

登录 免费注册