面向对象其他相关

hasattr,getattr,setattr,delattr.
检查成员,获取成员,设置成员,删除成员.

class Foo():
    def __init__(self):
        self.name = ‘wupeiqi‘

    def func(self):
        return ‘func‘
obj = Foo()
检查是否含有成员
print(hasattr(obj,‘name‘))  #结果Ture
print(hasattr(obj,‘func‘))  #结果Ture
print(hasattr(obj,‘nice‘))  #结果False

获取成员
print(getattr(obj,‘name‘))  #结果wupeiqi
print(getattr(obj,‘func‘)())    #结果func

设置成员
setattr(obj,‘age‘,18)
print(getattr(obj,‘age‘))   #结果18

setattr(obj,‘nice‘,lambda x:x**2)
print(getattr(obj,‘nice‘)(2))   #结果4

删除成员
delattr(obj,‘name‘)
print(getattr(obj,‘name‘))  #报错，原因‘Foo‘对象没有属性‘name‘（‘Foo‘ object has no attribute ‘name‘）
delattr(obj,‘func‘)
print(getattr(obj,‘func‘))  #报错