Python笔记【7】_反射getattr&hasattr&setattr&delattr

Lesson0402_GetatrrWebsite.py

#!/usr/bin/env/python
#-*-coding:utf-8-*-

#Author:LingChongShi   #查看源码Ctrl+左键

def index():
    print('欢迎访问XX网站')

def login():
    print('登录成功')

def logout():
    print('退出登录')

class People(object):
    country='China'
    def __init__(self):
        pass
    def people_info(self):
        print('People类中people_info函数')

Lesson0403_Getattr.py

#!/usr/bin/env/python
#-*-coding:utf-8-*-

#Author:LingChongShi   #查看源码Ctrl+左键

'''
getattr()：根据字符串的形式去某个模块中查找X函数
hasattr()：根据字符串的形式去某个模块判断X函数是否存在
setattr()：根据字符串的形式去某个模块设置X函数
delattr()：根据字符串的形式去某个模块删除X函数
'''
import Lesson04_Package.Lesson0402_GetatrrWebsite
'''getattr(object,name,default):
1、object:对象（模块）
2、name:属性（函数/方法）
3、default：无对应属性，返回的值，
4、有对应属性，返回对象属性值
'''
getder=getattr(Lesson04_Package.Lesson0402_GetatrrWebsite,'index','-1')
print(getder)
getder()

obj=Lesson04_Package.Lesson0402_GetatrrWebsite.People()
getclass=getattr(obj,'people_info','-1')
getclass()

'''hasattr(object,name):
1、object:对象（模块）
2、name:属性（函数/方法）
3、如果对象有该属性返回True，否则返回False
'''
has=hasattr(Lesson04_Package.Lesson0402_GetatrrWebsite,'login')
print(has)

obj=Lesson04_Package.Lesson0402_GetatrrWebsite.People()
hasclass=hasattr(obj,'people_info')
print(hasclass)

'''setattr(object,name,value):
1、object:对象（模块）
2、name:属性（函数/方法）
3、value：属性值
4、无返回值
'''
set=setattr(Lesson04_Package.Lesson0402_GetatrrWebsite,'str','添加的字符串')
has1=hasattr(Lesson04_Package.Lesson0402_GetatrrWebsite,'str')
print(has1)
get1=getattr(Lesson04_Package.Lesson0402_GetatrrWebsite,'str')
print(get1)

obj=Lesson04_Package.Lesson0402_GetatrrWebsite.People()
setclass=setattr(obj,'exit','退出')
hascalss=hasattr(obj,'exit')
print(hasclass)

'''delattr(object,name):
1、object:对象（模块）
2、name:属性（函数/方法）
3、无返回值
'''
del1=delattr(Lesson04_Package.Lesson0402_GetatrrWebsite,'logout')
has2=hasattr(Lesson04_Package.Lesson0402_GetatrrWebsite,'logout')
print(has2)
# get2=getattr(Lesson04_Package.Lesson0402_GetatrrWebsite,'logout')
# print(get2)

obj=Lesson04_Package.Lesson0402_GetatrrWebsite.People
hasclass=hasattr(obj,'people_info')
print(hasclass)
delclass=delattr(obj,'people_info')
hasclass=hasattr(obj,'people_info')
print(hasclass)