以下是一个简单的现货购销交收系统的部分代码示例：[  V：zzwx1212   QQ：2247238820   TG:@zztg001  ]

python
# 购销订单类  
class PurchaseOrder:  
    def __init__(self, order_id, buyer, seller, quantity, price):  
        self.order_id = order_id  
        self.buyer = buyer  
        self.seller = seller  
        self.quantity = quantity  
        self.price = price  
  
    def get_total_price(self):  
        return self.quantity * self.price  
  
# 购销交收类  
class PurchaseDelivery:  
    def __init__(self, order_id, buyer, seller, quantity, price, delivery_date):  
        self.order_id = order_id  
        self.buyer = buyer  
        self.seller = seller  
        self.quantity = quantity  
        self.price = price  
        self.delivery_date = delivery_date  
  
    def get_total_price(self):  
        return self.quantity * self.price  
  
# 买家类  
class Buyer:  
    def __init__(self, buyer_id, name):  
        self.buyer_id = buyer_id  
        self.name = name  
  
    def place_order(self, seller, quantity, price):  
        order_id = generate_order_id()  # 生成订单号的函数，具体实现略过