无参装饰器模板

def outh(func):
    def wrapper(*args,**kwargs):
        res=func(*args,**kwargs)
        return res
    return wrapper
@outh
#无参装饰器案例
import time
from functools import wraps
def auth(func):
    @wraps(func)
    def wrapper(*args,**kwargs):
        name=input('name>>>: ').strip()
        pwd=input('pwd>>>: ').strip()
        if name == 'egon' and pwd == '123':
            print('login successfull')
            res=func(*args,**kwargs)
            return res
        else:
            print('user or pwd error')
    return wrapper


def outter(func):
    def wrapper(*args,**kwargs):
        res=func(*args,**kwargs)
        return res
    return wrapper

@auth
def index():
    """
    sadadsda
    :return:
    """
    time.sleep(1)
    print('welcome to index page')
    return 1234

print(index.__name__)
print(index.__doc__)
index()

有参装饰器模板

def auth(engine='file'):
    def outter(func):
        def wrapper(*args, **kwargs):
            res = func(*args, **kwargs)
            return res
        return wrapper
    return outter

@auth('file')
#有参装饰器案例
import time

current_user={'user':None}

def auth(engine='file'):
    def outter(func):
        def wrapper(*args,**kwargs):
            if current_user['user'] is not None:
                res=func(*args,**kwargs)
                return res

            user=input('username>>>: ').strip()
            pwd=input('password>>>: ').strip()

            if engine == 'file':
                # 基于文件的认证
                if user == 'egon' and pwd == '123':
                    print('login successfull')
                    current_user['user']=user
                    res=func(*args,**kwargs)
                    return res
                else:
                    print('user or password error')
            elif engine == 'mysql':
                # 基于mysql的认证
                print('基于mysql的认证')
            elif engine == 'ldap':
                # 基于ldap的认证
                print('基于ldap的认证')
            else:
                print('不知道engine')
        return wrapper
    return outter

@auth('file') #@outter #index=outter(index) # index=wrapper
def index():
    time.sleep(1)
    print('from index')

@auth('mysql') #@outter # home=outter(home) #home=wrapper
def home(name):
    print('welcome %s' %name)

index()
home('egon')

叠加多个装饰器

#自上而下
import time
from functools import wraps
def timmer(func):
    @wraps(func)
    def aaa(*args,**kwargs):
        start=time.time()
        res=func(*args,**kwargs) #最原始那个index的内存地址()
        stop=time.time()
        print('run time is %s' %(stop -start))
        return res
    return aaa


def auth(func):
    @wraps(func)
    def bbb(*args,**kwargs):
        name=input('name>>>: ').strip()
        pwd=input('pwd>>>: ').strip()
        if name == 'mzk' and pwd == '123':
            print('login successfull')
            res=func(*args,**kwargs)
            return res
        else:
            print('user or pwd error')
    return bbb

@timmer 
@auth
def index():
    """
    jklkljlkjlkjk
    :return:
    """
    time.sleep(1)
    print('from index')
print(index.__doc__)
index()