如何在Python类中添加set方法修改Supplier实例的postcode属性值

你只需要在Supplier类中新增一个专门用于修改postcode属性的实例方法即可，具体实现如下：

实现步骤 #

1. 在Supplier类内部定义set_postcode方法，接收新的邮政编码作为入参，将其赋值给实例的postcode属性即可，也可根据需求增加入参合法性校验逻辑。
2. 实例化类之后调用该方法，传入目标值4980就可以完成修改。

完整修改后的代码示例 #

supplier_105 = {
    "city": "Port Bradley",
    "contact_firstname": "Brittany",
    "contact_lastname": "Costa",
    "contact_title": "Mrs",
    "country": "Australia",
    "email": "brittany8706.costa@gmail.com",
    "notes": "",
    "phone": "(08) 6939 8022",
    "postcode": "3880",
    "state": "Costa",
    "street_address": "6/81 Heather Rosebowl",
    "supplier_id": 105,
    "supplier_name": "Rodriguez, Carter and Johnson",
}


# Write your code here

class Supplier:
    def __init__(
        self,
        city,
        contact_firstname,
        contact_lastname,
        contact_title,
        country,
        email,
        notes,
        phone,
        postcode,
        state,
        street_address,
        supplier_id,
        supplier_name,
    ):
        print("Initialiser called")
        self.city = city
        self.contact_firstname = contact_firstname
        self.contact_lastname = contact_lastname
        self.contact_title = contact_title
        self.country = country
        self.email = email
        self.notes = notes
        self.phone = phone
        self.postcode = postcode
        self.state = state
        self.street_address = street_address
        self.supplier_id = supplier_id
        self.supplier_name = supplier_name

    def get_state(self):
        return "The state is {} and the postcode is {}".format(self.state, self.postcode)
    
    # 新增的修改postcode的方法
    def set_postcode(self, new_postcode):
        # 可选校验：澳大利亚邮政编码为4位数字，可根据实际规则调整
        if isinstance(new_postcode, str) and len(new_postcode) == 4 and new_postcode.isdigit():
            self.postcode = new_postcode
        else:
            raise ValueError("传入的邮政编码不合法，应为4位数字字符串")


# 2. 实例化类
Supplier_105 = Supplier(
    "Port Bradley",
    "Brittany",
    "Costa",
    "Mrs",
    "Australia",
    "brittany8706.costa@gmail.com",
    "",
    "(08) 6939 8022",
    "3880",
    "Costa",
    "6/81 Heather Rosebowl",
    "105",
    "Rodriguez, Carter and Johnson",
)
print(Supplier_105.supplier_name)

# 3. 调用原有方法
print(Supplier_105.get_state())

# 修改postcode为4980
Supplier_105.set_postcode("4980")
# 验证修改结果
print(Supplier_105.get_state())

运行效果 #

调用set_postcode("4980")后再次调用get_state()，即可看到postcode已经更新为4980。

内容的提问来源于stack exchange，提问作者user16691147