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python: Enumeration Algorithm

  • 2026-08-18 23:10:38
python: Enumeration Algorithm
# encoding: utf-8# 版权所有  2026 ©涂聚文有限公司™ ®# 许可信息查看:言語成了邀功盡責的功臣,還需要行爲每日來值班嗎# 描述:Enumeration Algorithm# Author    : geovindu,Geovin Du 涂聚文.# IDE       : PyCharm 2024.3.6 python 3.11# os        : windows 10# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  Oracle 21c Neo4j# Datetime  : 2026/7/14 23:26# User      :  geovindu# Product   : PyCharm# Project   : PyAlgorithms# File      : Enumeration.py#class Jewelry:    """    珠宝商品数据模型    """    def __init__(self, j_id, category, material, price, stock):        """        珠宝商品        :param j_id: 商品编号        :param category: 品类:项链/戒指/手镯/耳饰        :param material: 材质:黄金/铂金/钻石/银饰/K金        :param price: 单价(元)        :param stock: 库存数量        """        self.j_id = j_id        self.category = category        self.material = material        self.price = price        self.stock = stock    def __repr__(self):        return f"【{self.j_id}{self.category} | {self.material} | 售价:{self.price}元 | 库存:{self.stock}件"# ====================== 枚举算法核心:遍历所有珠宝筛选符合条件商品 ======================def enumeration_filter_jewelry(jewelry_list, max_budget, target_material=None, target_category=None, min_stock=1):    """    枚举算法:遍历全部珠宝,筛选满足约束的商品    :param jewelry_list: 全店珠宝列表    :param max_budget: 顾客最高预算    :param target_material: 指定材质,None不限制    :param target_category: 指定品类,None不限制    :param min_stock: 最低库存要求    :return: 筛选后的可选珠宝列表(全部可行解)    """    match_result = []    # 枚举:逐个遍历店内所有珠宝(全部候选解)    for item in jewelry_list:        # 约束1:价格不超过预算        if item.price > max_budget:            continue        # 约束2:库存充足        if item.stock < min_stock:            continue        # 约束3:材质匹配(有指定才校验)        if target_material is not None and item.material != target_material:            continue        # 约束4:品类匹配(有指定才校验)        if target_category is not None and item.category != target_category:            continue        # 全部条件满足,加入可行解集合        match_result.append(item)    return match_resultdef enum_jewelry_combination(jewelry_list, total_budget):    """    枚举两件首饰组合,总价不超过预算    :param jewelry_list:    :param total_budget:    :return:    """    combo_list = []    # 第一层枚举项链    for necklace in [x for x in jewelry_list if x.category == "项链"]:        # 第二层枚举戒指        for ring in [x for x in jewelry_list if x.category == "戒指"]:            total_price = necklace.price + ring.price            if total_price <= total_budget and necklace.stock > 0 and ring.stock > 0:                combo_list.append((necklace, ring, total_price))    return combo_listdef init_jewelry_store():    """    初始化门店珠宝库存数据    :return:    """    store_goods = [        Jewelry("N001""项链""黄金"528012),        Jewelry("N002""项链""铂金"76003),        Jewelry("N003""项链""钻石"128005),        Jewelry("N004""项链""K金"36808),        Jewelry("R001""戒指""黄金"215015),        Jewelry("R002""戒指""钻石"99992),        Jewelry("R003""戒指""银饰"59930),        Jewelry("B001""手镯""黄金"86004),        Jewelry("B002""手镯""银饰"128022),        Jewelry("E001""耳饰""K金"168018),        Jewelry("E002""耳饰""铂金"42006),        Jewelry("E003""耳饰""钻石"65000),  # 无库存,会被过滤    ]    return store_goods# encoding: utf-8# 版权所有  2026 ©涂聚文有限公司™ ®# 许可信息查看:言語成了邀功盡責的功臣,還需要行爲每日來值班嗎# 描述:Enumeration Algorithm# Author    : geovindu,Geovin Du 涂聚文.# IDE       : PyCharm 2024.3.6 python 3.11# os        : windows 10# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  Oracle 21c Neo4j# Datetime  : 2026/7/14 23:28# User      :  geovindu# Product   : PyCharm# Project   : PyAlgorithms# File      : EnumerationBll.pyfrom Enumeration.Enumeration import init_jewelry_store,enumeration_filter_jewelryclass EnumerationBll(object):    """    """    def demo(self):        """        :return:        """        all_jewelry = init_jewelry_store()        print("===== 珠宝门店全部商品(枚举全集) =====")        for goods in all_jewelry:            print(goods)        print("-" * 70)        # 场景1:顾客1 预算6000内,不限材质、不限品类,有货即可        print("\n【顾客需求1】预算≤6000元,任意品类任意材质,有库存")        customer1_result = enumeration_filter_jewelry(all_jewelry, max_budget=6000)        if customer1_result:            for res in customer1_result:                print(res)        else:            print("无符合条件首饰")        # 场景2:顾客2 预算10000内,只想要黄金手镯        print("\n【顾客需求2】预算≤10000元,仅黄金手镯")        customer2_result = enumeration_filter_jewelry(            all_jewelry,            max_budget=10000,            target_material="黄金",            target_category="手镯"        )        for res in customer2_result:            print(res)        # 场景3:顾客3 预算5000内,铂金耳饰        print("\n【顾客需求3】预算≤5000元,铂金耳饰")        customer3_result = enumeration_filter_jewelry(            all_jewelry,            max_budget=5000,            target_material="铂金",            target_category="耳饰"        )        for res in customer3_result:            print(res)        # 场景4:顾客4 预算8000,钻石戒指(库存不足/超预算测试)        print("\n【顾客需求4】预算≤8000元,钻石戒指")        customer4_result = enumeration_filter_jewelry(            all_jewelry,            max_budget=8000,            target_material="钻石",            target_category="戒指"        )        print(customer4_result if customer4_result else "无匹配首饰")
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  1. CONNECT:[ UseTime:0.000515s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000605s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.003245s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004806s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000617s ]
  6. SELECT * FROM `set` [ RunTime:0.002533s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000635s ]
  8. SELECT * FROM `article` WHERE `id` = 505181 LIMIT 1 [ RunTime:0.037391s ]
  9. UPDATE `article` SET `lasttime` = 1787328208 WHERE `id` = 505181 [ RunTime:0.007056s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000540s ]
  11. SELECT * FROM `article` WHERE `id` < 505181 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001373s ]
  12. SELECT * FROM `article` WHERE `id` > 505181 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004557s ]
  13. SELECT * FROM `article` WHERE `id` < 505181 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.032996s ]
  14. SELECT * FROM `article` WHERE `id` < 505181 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.038281s ]
  15. SELECT * FROM `article` WHERE `id` < 505181 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.020404s ]
0.271155s