如何或是否有必要在python中定义类中的属性类型

from typing import List, Dict

class MyClass:
    def __init__(self, name: str, age: int, scores: List[float], info: Dict[str, str]):
        self.name = name
        self.age = age
        self.scores = scores
        self.info = info

def add_student(student: MyClass, new_score: float) -> None:
    if not isinstance(new_score, (int, float)):
        raise ValueError("Score must be a number.")
    student.scores.append(new_score)

from typing import List

class Student:
    def __init__(self, name: str, age: int, scores: List[float]):
        self.name = name
        self.age = age
        self.scores = scores

    def add_score(self, new_score: float) -> None:
        if not isinstance(new_score, (int, float)):
            raise ValueError("Score must be a number.")
        self.scores.append(new_score)

# 使用示例
student = Student("Alice", 20, [85.5, 90.0])
student.add_score(95.5)
print(student.scores)  # 输出: [85.5, 90.0, 95.5]