Python -- 反射(1)

getattr、hasattr、setattr、delattr

class Foo:
    def __init__(self,name,age):
        self.n = name
        self.a = age
    def show(self):
        return '%s_%s' %(self.n,self.a)

obj = Foo('Tom',29)
func = getattr(obj,'show')    #获取show方法
print(func)
r = func()
print(r)

print(hasattr(obj,'n'))    #判断obj对象是否有n这个字段
print(hasattr(obj,'a'))    #判断obj对象是否有a这个字段

setattr(obj,'job','worker')    #增加job字段，赋值为worker
print(obj.job)
delattr(obj,'a')    #删除a字段

输出：

<bound method Foo.show of <__main__.Foo object at 0x0000026C049EEF60>>
Tom_29
True
True
worker