python，将混合值写入class/instance

class MyClass:
    def __init__(self, name, age, hobbies):
        self.name = name  # 字符串
        self.age = age      # 整数
        self.hobbies = hobbies  # 列表

# 创建一个实例
person = MyClass("Alice", 30, ["reading", "hiking"])

# 访问属性
print(person.name)      # 输出: Alice
print(person.age)       # 输出: 30
print(person.hobbies)  # 输出: ['reading', 'hiking']

# 修改属性
person.age = 31
person.hobbies.append("swimming")

# 再次访问属性
print(person.age)       # 输出: 31
print(person.hobbies)  # 输出: ['reading', 'hiking', 'swimming']

if hasattr(person, 'address'):
    print(person.address)
else:
    print("Address not found")

if isinstance(new_age, int):
    person.age = new_age
else:
    print("Age must be an integer")