每月1号，自动生成本月份的物业费。如果该住户之前的物业费未交清，则本月物业费与之前拖欠费用进行累加，为该用户应缴纳的物业费。 缴费功能。根据用户缴纳金额，修改“应缴纳物业费”。 统计功能。 能够按楼号分类统计所有未交清物业费的记录。的代码

这里使用 Python 语言来实现上述功能：

class PropertyManagement:
    def __init__(self):
        self.property_records = {}  # 物业费记录，以住户名为 key，value 为元组 (应缴纳物业费, 已缴纳物业费)
        self.building_records = {}  # 按楼号分类的未交清物业费记录，以楼号为 key，value 为住户名列表

    def generate_property_fee(self):
        # 自动生成本月份的物业费
        for name, (unpaid_fee, paid_fee) in self.property_records.items():
            if unpaid_fee > 0:
                self.property_records[name] = (unpaid_fee + 100, paid_fee)

    def update_property_fee(self, name, amount):
        # 根据用户缴纳金额，修改“应缴纳物业费”
        unpaid_fee, paid_fee = self.property_records[name]
        if amount >= unpaid_fee:
            paid_fee += unpaid_fee
            unpaid_fee = 0
        else:
            paid_fee += amount
            unpaid_fee -= amount
        self.property_records[name] = (unpaid_fee, paid_fee)

        # 更新按楼号分类的未交清物业费记录
        building = name.split('-')[0]
        if unpaid_fee > 0:
            if building not in self.building_records:
                self.building_records[building] = []
            if name not in self.building_records[building]:
                self.building_records[building].append(name)

    def get_unpaid_fee_by_building(self, building):
        # 按楼号分类统计所有未交清物业费的记录
        if building not in self.building_records:
            return []
        unpaid_records = []
        for name in self.building_records[building]:
            unpaid_fee, paid_fee = self.property_records[name]
            if unpaid_fee > 0:
                unpaid_records.append((name, unpaid_fee))
        return unpaid_records

使用示例：

pm = PropertyManagement()

# 添加物业费记录
pm.property_records['101-张三'] = (100, 0)
pm.property_records['102-李四'] = (200, 0)
pm.property_records['201-王五'] = (0, 0)

# 自动生成本月份的物业费
pm.generate_property_fee()

# 缴费功能测试
pm.update_property_fee('101-张三', 150)
pm.update_property_fee('102-李四', 100)
pm.update_property_fee('201-王五', 50)

# 统计功能测试
print(pm.get_unpaid_fee_by_building('101'))  # [('101-张三', 50)]
print(pm.get_unpaid_fee_by_building('102'))  # []
print(pm.get_unpaid_fee_by_building('201'))  # []