python3.8 := and python3.7 dataclass

代码示例

from dataclasses import field,dataclass

@dataclass

class People:

    name :str =field(init="张三")

    mylist: list = field(default_factory=list)

    age :int = 26

    def run(self):

        self.mylist.append(self.age)

        if (n:=len(self.mylist))>0:

            print(f"元素个数为:{n}")

        print(self.name)

        print(self.mylist)

if __name__ == '__main__':

    p=People(name="哈哈")

    p.run()

巴特西

python3.8 := and python3.7 dataclass

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