面向對象和類

# 1.類的屬性class cat:    name = '布偶'    age = 9p1 = cat  # 這是一個cat類print(p1)print(p1.name)p2 = cat()  # 這是一個cat對象print(p2)print(p1.name)p3 = catp3.name = '毛線'  # 屬性會優先找對象，對象沒有才會去類找print(p2.name)print(p2.__dict__)  # {}   __dict__獲取對象的字典信息print(p2.__class__)  # 查看類型print(cat.__dict__)# 2.初始化屬性class Teacher:    school = "oldboy"    # def init(obj, name, age):    #     obj.name = name    #     obj.age = age    def __init__(self, name, age):        print(self)        self.name = name        self.age = aget1 = Teacher("jack", 18)print(t1.name)print(t1)# 3.行爲定製class Student:    school = "oldgirl"    def __init__(self, name, age, gender):        self.name = name        self.age = age        self.gender = gender    # def study(self):    #     print(self)    def say_hi(self):        # print(self)        print("hello i am a student! my name:%s" % self.name)    def a(self):        picklestu1 = Student("jack", 20, "male")  # 這是一個對象stu2 = Student("rose", 18, "female")# stu1.say_hi()# stu2.say_hi()# print(stu1)# stu2.say_hi() # 對象調用函數# Student.say_hi(stu1) # 類調用函數print(type(Student.say_hi))print(type(stu1.say_hi))# 4.類綁定方法class OldBoyStudent:    school = "oldboy"    def __init__(self,name):        self.name = name    @classmethod    # 類綁定方法    def show_school(cls):        # print(self.school)        print(cls)    @staticmethod # 看成普通函數    def print_hello():        print("hello world")