摘要：class Stuent(object): stu_num = 0 __stu_num = 0 name = 333 def __init__(self,name): self.name = name # self.stu_num += 1 # 这就相当于对实例进行了赋值 Stuent.stu_nu 阅读全文

摘要：#类方法通过@classmethod 装饰器实现# 类方法和普通方法的区别是，类方法只能访问类变量，不能访问实例变量class Dog(): name = "stupid_dog" def __init__(self,name): self.name = name @classmethod def 阅读全文

摘要：#1. 列表生成器num = [x for x in range(1,10)]print(num)old = [x for x in range(1,100) if x % 2 == 1]print(old)print([x * x for x in range(10)])a = ["a","b", 阅读全文