python摸爬滚打之day18----

 1 class Animal:
 2     pass
 3 class Cat(Animal):
 4     pass
 5 class LanCat(Cat):
 6     pass
 7 
 8 c = Cat()
 9 l = LanCat()
10 print(isinstance(Cat(),Animal))    #  True  判断前者是否是后者的一个对象
11 print(issubclass(Cat,Animal))     #  True  判断cat是不是animal的子类

 1 class Base:
 2     base = "父类的"
 3     def chi(self):
 4         print("吃的开心")
 5     def he(self):
 6         print("喝的好撑")
 7 
 8 class Sclass(Base):
 9     son = "子类的"
10     def __init__(self,name):
11         self.name = name
12     def wan(self):
13         print("玩得舒服")
14 p = Sclass("防滑链")
15 
16 print(getattr(p,"name"))
17 print(getattr(p,"son"))
18 print(getattr(Sclass,"son"))
19 print(getattr(p,"base"))
20 print(getattr(Base,"base"))
21 
22 print(getattr(p,"wan"))         # 从对象里找,找到的是wan()方法的内存地址
23 print(getattr(Sclass,"wan"))    # 从类里找,找到的是wan()函数的内存地址.
24 print(getattr(p,"wan")())
25 
26 # 如果想反射到别的.py文件,就必须导入 "import py文件名" ,getattr(py文件名.类名,str)

1 path = "字符串导入模块.example.fanshe"      # 模块路径
2 import importlib
3 inp = input("请输入要查看的类别[f1,f2,f3]: ")
4 m = importlib.import_module(path)       # 通过字符串的形式来导入模块
5 if hasattr(m.Cate,inp):     #  m.Cate, 即inp是否在类的成员方法里面, 不能写直接写m, 找不到的
6     obj = m.Cate()          #  创建obj对象
7     print(getattr(obj,inp)())
8 else:
9     print("不存在此类别.")