将面向过程代码改为面向对象代码
list_commodity_infos = [
{"cid": 1001, "name": "屠龙刀", "price": 10000},
{"cid": 1002, "name": "倚天剑", "price": 10000},
{"cid": 1003, "name": "金箍棒", "price": 52100},
{"cid": 1004, "name": "口罩", "price": 20},
{"cid": 1005, "name": "酒精", "price": 30},
]
# 订单列表
list_orders = [
{"cid": 1001, "count": 1},
{"cid": 1002, "count": 3},
{"cid": 1005, "count": 2},
]
class Commodity:
def __init__(self, cid, name="", price=0):
self.cid = cid
self.name = name
self.price = price
class Order:
def __init__(self, cid=0, count=None):
self.cid = cid
self.count = count
list_commodity_infos = [
Commodity(1001, "屠龙刀", 10000),
Commodity(1002, "倚天剑", 10000),
Commodity(1003, "金箍棒", 52100),
Commodity(1004, "口罩", 20),
Commodity(1005, "酒精", 30),
]
list_orders = [
Order(1001, 1),
Order(1002, 3),
Order(1005, 4),
]
def print_single_commodity(commodity):
print(f"编号:{commodity.cid},商品名称:{commodity.name},商品单价:{commodity.price}")
# 1. 定义函数,打印所有商品信息,格式：商品编号xx,商品名称xx,商品单价xx.
def print_commodity_infos():
for commodity in list_commodity_infos:
print_single_commodity(commodity)
# 2. 定义函数,打印商品单价小于2万的商品信息
def print_price_in_2w():
for commodity in list_commodity_infos:
if commodity.price < 20000:
print_single_commodity(commodity)
# 3. 定义函数,打印所有订单中的商品信息,
def print_order_infos():
for order in list_orders: # 遍历所有订单
for commodity in list_commodity_infos: # 遍历所有商品信息
if order.cid == commodity.cid:
print(f"商品名称{commodity.name},商品单价:{commodity.price},数量{order.count}.")
break # 跳出内层循环
# 4. 查找最贵的商品(使用自定义算法,不使用内置函数)
def commodity_max_by_price():
max_value = list_commodity_infos[0]
for i in range(1, len(list_commodity_infos)):
if max_value.price < list_commodity_infos[i].price:
max_value = list_commodity_infos[i]
return max_value
# 5. 根据单价对商品列表降序排列
def descending_order_by_price():
for r in range(len(list_commodity_infos) - 1):
for c in range(r + 1, len(list_commodity_infos)):
if list_commodity_infos[r].price < list_commodity_infos[c].price:
list_commodity_infos[r], list_commodity_infos[c] = list_commodity_infos[c], list_commodity_infos[r]
print_order_infos()
cmd = commodity_max_by_price()
print(cmd) # <__main__.Commodity object at 0x7f61ca2c44e0>
print(cmd.__dict__)
print_single_commodity(cmd)
descending_order_by_price()
print_commodity_infos()
