class Student:

? ? def __init__(self, name, score):

? ? ? ? self.name = name

? ? ? ? self.score = score

s = Student("張三", 95)

print(s.name) ?# 輸出: 張三

class FileHandler:

? ? def __del__(self):

? ? ? ? print("文件句柄已釋放")

class Car:

? ? def __init__(self, brand):

? ? ? ? self.brand = brand

  
? ? def __str__(self):

? ? ? ? return f"汽車品牌: {self.brand}"

  
car = Car("特斯拉")

print(car) ?# 輸出: 汽車品牌: 特斯拉

def __repr__(self):

? ? return f'Car("{self.brand}")'

class Vector:

? ? def __init__(self, x, y):

? ? ? ? self.x = x

? ? ? ? self.y = y

  
? ? def __add__(self, other):

? ? ? ? return Vector(self.x + other.x, self.y + other.y)

  
v1 = Vector(1, 2)

v2 = Vector(3, 4)

v3 = v1 + v2

print(v3.x, v3.y) ?# 輸出: 4 6

def __eq__(self, other):

? ? return self.x == other.x and self.y == other.y

class MyList:

? ? def __init__(self, data):

? ? ? ? self.data = data

  ? def __len__(self):

? ? ? ? return len(self.data)


ml = MyList([1, 2, 3])

print(len(ml)) ?# 輸出: 3

def __getitem__(self, index):

? ? return self.data[index]

class Multiplier:

? ? def __init__(self, factor):

? ? ? ? self.factor = factor

  


? ? def __call__(self, x):

? ? ? ? return x * self.factor
 


double = Multiplier(2)

print(double(5)) ?# 輸出: 10

class Fraction:

? ? def __init__(self, numerator, denominator):

? ? ? ? self.numerator = numerator

? ? ? ? self.denominator = denominator

  


? ? def __str__(self):

? ? ? ? return f"{self.numerator}/{self.denominator}"

  


? ? def __add__(self, other):

? ? ? ? new_num = self.numerator * other.denominator + other.numerator * self.denominator

? ? ? ? new_den = self.denominator * other.denominator

? ? ? ? return Fraction(new_num, new_den)


f1 = Fraction(1, 2)

f2 = Fraction(1, 3)

result = f1 + f2

print(result) ?# 輸出: 5/6