ソースコード

#coding:utf-8
#class 2025/2/11

#classの定義:classはあるオブジェクトのテンプレートに相当する
#クラスの名前は第１文字大文字で、残りは小文字とします。
#例1
class Car:   
    def __init__(self,brand,color,type,price,picture): #initialize 初期化
    #self means created instance itself automatically do not need pass anything to self
    
    #attributes 属性,特徴の定義   
        self.brand = brand
        self.color = color
        self.type = type
        self.price = price
        self.picture = picture
   
    #methods 方法の定義
    def info(self):  
        print(f"The car of {self.brand} is {self.color}, type is {self.type}.")
        print(f"価格={self.price} 写真={self.picture}")


#instance,object　オブジェクトの実例
Tesla = Car("Tesla","Black","Model Y",2000000,"./images/aso.jpg")
Tesla.info()

#例２
class Person:
#初期化
    def __init__(self,f_name,l_name):
    #attributes 属性,特徴の定義     
        self.firstname = f_name
        self.lastname = l_name

#method 
    def print_name_eng(self):
        print(self.firstname,self.lastname)

#method 
    def print_name_jp(self):
        print(self.lastname,self.firstname)

#instance,object
x = Person("Nhung","桜原")
x.print_name_jp()

y = Person("John","Smith")
y.print_name_eng()

#例3
class Rectangle:
    #初期化
    def __init__(self,length,width):
        #attributes 特徴量、属性
        self.rect_length = length
        self.rect_width = width

    #methods
    def print_area(self):
        print(f"面積 = {self.rect_length * self.rect_width}")
#instances
for i in range(3):
    x = int(input("長方形の縦幅: "))
    y = int(input("長方形の横幅: "))
    shape = Rectangle(x,y)
    shape.print_area()

   
    

実行結果