Python初步了解装饰器
- 装饰器的概念
- 装饰器的简单使用
- 装饰器的进阶
- 装饰器的练习
- 装饰器的固定模块
- 装饰器的语法糖
装饰器的概念
装饰器它不是一个新的知识点，它是有之前我们学习的名称空间、函数嵌套、闭包函数等知识点汇总而来
器：工具
装饰：为其他事物添加功能
装饰器：不修该装饰的源代码的情况下，不改变源代码的调用的前提下，对装饰对象进行功能的增加。
核心思想
开放封闭原则：
开发：对扩展功能的开放，在源代码不改变的情况下，进行功能的添加
封闭：源代码是封闭的
import time#内置时间模块
def inside(group,s):
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)#设置时间间隔
print('全军出击')
inside('红色',30)
#tine.time()时间搓从1970年开始
方案1
#没有修改调用方式，倒是修改了源代码
import time#内置时间模块
def inside(group,s):
stm_time=time.time()
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)
print('全军出击')
end_time=time.time()
print(end_time-stm_time)
inside('红色',30)
装饰器的简单使用
方案二
代码冗余
import time
def inside(group,s):
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)
print('全军出击')
stm_time=time.time()
inside('红色',30)
end_time=time.time()
print(end_time - stm_time)
方案三
调用方式被修改
import time
def inside(group,s):
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)
print('全军出击')
def worap():
stm_time=time.time()
inside('红色',30)
end_time=time.time()
print(end_time - stm_time)
worap()
方案四
import time
def inside(group,s):
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)
print('全军出击')
def worap(*args,**kwargs):
stm_time=time.time()
inside(*args,**kwargs)
end_time=time.time()
print(end_time - stm_time)
worap('蓝色',30)
方案五
import time
def inside(group,s):
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)
print('全军出击')
def ouct(func):
# func=inside
def worap(*args,**kwargs):
stm_time=time.time()
func(*args,**kwargs)
end_time=time.time()
print(end_time - stm_time)
return worap
res=ouct(inside)
res('蓝色',10)
装饰器的进阶
方案六
import time
def inside(group,s):
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)
print('全军出击')
def ouct(func):
# func=inside
def worap(*args,**kwargs):
stm_time=time.time()
func(*args,**kwargs)
end_time=time.time()
print(end_time - stm_time)
return worap
inside=ouct(inside)
inside('蓝色',10)
方案七
添加一个充电功能
import time
def inside(group,s):
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)
print('全军出击')
def recharn(num):
for i in range(num,101):
time.sleep(0.05)
print(f'\r当前电量{"‖"*i}{i}%',end='')
print('电量已充满。')
def ouct(func):
# func=inside
def worap(*args,**kwargs):
stm_time=time.time()
func(*args,**kwargs)
end_time=time.time()
print(end_time - stm_time)
return worap
inside=ouct(inside)
inside('蓝色',10)
recharn=ouct(recharn)
recharn(20)
方案八
import time
def inside(group,s):
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)
print('全军出击')
def recharn(num):
for i in range(num,101):
time.sleep(0.05)
print(f'\r当前电量{"‖"*i}{i}%',end='')
print('电量已充满。')
def ouct(func):
# func=inside
def worap(*args,**kwargs):
stm_time=time.time()
res=func(*args,**kwargs)
end_time=time.time()
print(end_time - stm_time)
return res
return worap
recharn=ouct(recharn)
recharn(20)
装饰器的语法糖
方案九
import time
def ouct(func):
# func=inside
def worap(*args,**kwargs):
stm_time=time.time()
res=func(*args,**kwargs)
end_time=time.time()
print(end_time - stm_time)
return res
return worap
@ouct
def inside(group,s):
print('欢迎来到英雄联盟')
print(f'你所在的是{group}方阵营')
print(f'敌军还要{s}秒到达战场')
time.sleep(s)
print('全军出击')
@ouct
def recharn(num):
for i in range(num,101):
time.sleep(0.05)
print(f'\r当前电量{"‖"*i}{i}%',end='')
print('电量已充满。')
recharn(20)
inside('红色',10)
装饰器的固定模块
def oute(funs):
def waropper(*arges,**kwargs):
res=funs(*arges,**kwargs)
return res
return waropper
# 时间差模块
import time
def oute_time(funs):
def waropper(*arges,**kwargs):
cmd_time=time.time()
res=funs(*arges,**kwargs)
out_time=time.time()
print(out_time-cmd_time)
return res
return waropper
@oute_time
def home():
time.sleep(2)
print('estdsfs')
