存货融资双十二促销活动

import pandas as pd

class InventoryManagement:
    def __init__(self, inventory_data):
        self.inventory = pd.DataFrame(inventory_data)
    
    def calculate_total_value(self):
        return (self.inventory['quantity'] * self.inventory['price']).sum()
    
    def update_inventory(self, new_data):
        self.inventory = pd.concat([self.inventory, new_data], ignore_index=True)
    
    def check_inventory_status(self):
        return self.inventory.to_dict(orient='records')

# 示例数据
inventory_data = [
    {'product_id': 1, 'product_name': 'Laptop', 'quantity': 10, 'price': 1000},
    {'product_id': 2, 'product_name': 'Smartphone', 'quantity': 20, 'price': 500}
]

# 创建库存管理实例
inventory_manager = InventoryManagement(inventory_data)

# 计算总价值
print("Total Inventory Value:", inventory_manager.calculate_total_value())

# 更新库存
new_data = [
    {'product_id': 3, 'product_name': 'Tablet', 'quantity': 15, 'price': 300}
]
inventory_manager.update_inventory(new_data)

# 检查库存状态
print("Inventory Status:", inventory_manager.check_inventory_status())