def outter(func):
?
#func = 函数的内存地址
?
    def wrapper(*args,**kwargs):
        res=func(*args,**kwargs)
        return res
    return wrapper
?
@outter # index=outter(index) # index=>wrapper
@outter # outter(index)
def index(x,y):
    print(x,y)

def auth(func,db_type):
    def wrapper(*args, **kwargs):
        name=input(‘your name>>>: ‘).strip()
        pwd=input(‘your password>>>: ‘).strip()
?
        if db_type == ‘file‘:
            print(‘基于文件的验证‘)
            if name == ‘egon‘ and pwd == ‘123‘:
                res = func(*args, **kwargs)
                return res
            else:
                print(‘user or password error‘)
        elif db_type == ‘mysql‘:
            print(‘基于mysql的验证‘)
        elif db_type == ‘ldap‘:
            print(‘基于ldap的验证‘)
        else:
            print(‘不支持该db_type‘)
?
    return wrapper
?
@auth  # 账号密码的来源是文件
?
def index(x,y):
    print(‘index->>%s:%s‘ %(x,y))
?
@auth # 账号密码的来源是数据库
?
def home(name):
    print(‘home->>%s‘ %name)
?
@auth # 账号密码的来源是ldap
?
def transfer():
    print(‘transfer‘)
?
?
index=auth(index,‘file‘)
home=auth(home,‘mysql‘)
transfer=auth(transfer,‘ldap‘)
?
#index(1,2)
?
#home(‘egon‘)
?
#transfer()

def deco(func):
    def wrapper(*args, **kwargs):
        name = input(‘your name>>>: ‘).strip()
        pwd = input(‘your password>>>: ‘).strip()
?
        if db_type == ‘file‘:
            print(‘基于文件的验证‘)
            if name == ‘egon‘ and pwd == ‘123‘:
                res = func(*args, **kwargs)
                return res
            else:
                print(‘user or password error‘)
        elif db_type == ‘mysql‘:
            print(‘基于mysql的验证‘)
        elif db_type == ‘ldap‘:
            print(‘基于ldap的验证‘)
        else:
            print(‘不支持该db_type‘)
?
    return wrapper
?
return deco
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deco=auth(db_type=‘file‘)
@deco # 账号密码的来源是文件
def index(x,y):
    print(‘index->>%s:%s‘ %(x,y))
?
deco=auth(db_type=‘mysql‘)
@deco # 账号密码的来源是数据库
def home(name):
    print(‘home->>%s‘ %name)
?
deco=auth(db_type=‘ldap‘)
@deco # 账号密码的来源是ldap
def transfer():
    print(‘transfer‘)
?
index(1,2)
home(‘egon‘)
transfer()

def auth(db_type):
    def deco(func):
        def wrapper(*args, **kwargs):
            name = input(‘your name>>>: ‘).strip()
            pwd = input(‘your password>>>: ‘).strip()
?
            if db_type == ‘file‘:
                print(‘基于文件的验证‘)
                if name == ‘egon‘ and pwd == ‘123‘:
                    res = func(*args, **kwargs)  # index(1,2)
                    return res
                else:
                    print(‘user or password error‘)
            elif db_type == ‘mysql‘:
                print(‘基于mysql的验证‘)
            elif db_type == ‘ldap‘:
                print(‘基于ldap的验证‘)
            else:
                print(‘不支持该db_type‘)
        return wrapper
    return deco
?
?
@auth(db_type=‘file‘)  # @deco # index=deco(index) # index=wrapper
def index(x, y):
    print(‘index->>%s:%s‘ % (x, y))
?
@auth(db_type=‘mysql‘)  # @deco # home=deco(home) # home=wrapper
def home(name):
    print(‘home->>%s‘ % name)
?
@auth(db_type=‘ldap‘)  # 账号密码的来源是ldap
def transfer():
    print(‘transfer‘)
?
#index(1, 2)
?
#home(‘egon‘)
?
#transfer()

def 有参装饰器(x,y,z):
    def outter(func):
        def wrapper(*args, **kwargs):
            res = func(*args, **kwargs)
            return res
        return wrapper
    return outter
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@有参装饰器(1,y=2,z=3)
def 被装饰对象():
    pass