class A(object): _in1 = None __in2 = None instance = None def __init__(self, a): # 若是不使用__new__函数来写单例模式,在__init__函数中添加想关代码 if not self.instance: self.instance = object.__new__(A) self._a = a self.b = 123 self.__c = 12345 def __new__(c...
class ReadWriteFile(object): # 把函数check_permission作为装饰器使用 @check_permission def read(self, username, filename): return open(filename, 'r').read() def write(self, username, filename, content): open(filename, 'a+').write(content) # 把函数check_permission作为普通函数使用 write =...
面向对象, 类与类之间有组合,大白话就是所谓的嵌套. """创建三个学校且三个学校的设施内容等都是一致."""classSchool(object):def__init__(self, name, address): self.name=name self.address=addressdefspeech(self):print('讲课') obj1= School('北京校区','美丽富饶的沙河') obj2= School('上海校...
classStu():school="peking university"# 类变量grade="freshman"# 类变量def__init__(self,name):self.name=name#实例变量self.age=19#实例变量defcampus(self):self.cam='medical college's=Stu('xuyang')print(Stu.name)#报错print(s.name)print(s.age)s1=Stu('xiehe')s1.campus()#只有调用campus方...
class Person: def _init_(myname,name): myname.name=name def sayhello(myname): print('My name is:',myname.name) p=Person('Bill') print(p) 尤其需要注意的一点:self指的是类实例对象本身,不是类本身。 class Test: def ppr(self): ...
2.嵌套(建模) 面向对象: 创建三个学校且三个学校的设施内容等都是一致. classSchool(object):def__init__(self,name,address): self.name=name self.address=addressdefspeech(self):print('讲课') obj1= School('老男孩北京校区','美丽富饶的沙河') ...
那么问题来了，参数列表 arg 该不该包含 self？又如：class C: pass def function2(var): ...
class Person: def __init__(self, name): self.name = name def greet(self): ...
class Person: def __init__(self, name, age): self.name = name self.age = age def introduce(self): return f"My name is {self.name} and I am {self.age} years old." # 使用匿名函数 addition_lambda = lambda x, y: x + y ...
通过嵌套装饰器，可以灵活地组合不同的配料。4. 观察者模式（Observer）import abcfrom typing import Listclass Subject(metaclass=abc.ABCMeta): @abc.abstractmethod def register_observer(self, observer: 'Observer'): pass @abc.abstractmethod def remove_observer(self, observer: 'Observer'):...