day18 练习

# 作业：
# 1、编写课上讲解的有参装饰器准备明天默写
 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) 
                    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')
def index(x, y):
    print('index->>%s:%s' % (x, y))

@auth(db_type='mysql')
def home(name):
    print('home->>%s' % name)


@auth(db_type='ldap')
def transfer():
    print('transfer')

index(1, 2)
home('egon')
transfer()


# 2：还记得我们用函数对象的概念，制作一个函数字典的操作吗，来来来，我们有更高大上的做法，
# 在文件开头声明一个空字典，然后在每个函数前加上装饰器，完成自动添加到字典的操作
dic = {}
k=0

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

        global k
        dic[k] = func
        k+=1
        return res

    return wrapper


@indic
def recharge():
    print('充值')


@indic
def transfer():
    print('转账')


@indic
def withdraw():
    print('提现')


@indic
def balance_inquiry():
    print('余额查询')

recharge()
transfer()
withdraw()
balance_inquiry()
print(dic)

# 3、 编写日志装饰器，实现功能如：一旦函数f1执行，则将消息2017-07-21 11:12:11 f1 run写入到日志文件中，
# 日志文件路径可以指定
# 注意：时间格式的获取
import time

a = time.strftime('%Y-%m-%d %X')
# from functools import wraps

def file(way):
    def indic(func):
        # @wraps(func)
        def wrapper(*args, **kwargs):
            res = func(*args, **kwargs)
            with open(f'{way}', 'at', encoding='utf-8')as x:
                x.write(f'{a} {func} run\n')

            return res

        return wrapper

    return indic


@file(r'D:\cool\login')
def f1():
    print('我超帅')


f1()

# 4、基于迭代器的方式，用while循环迭代取值字符串、列表、元组、字典、集合、文件对象
s='asdsfdgfd'
s=[1,2,3,4,5,6]
s=(1,2,3,4,5,6)
s={1:1,2:2,3:3}
s={1,2,3,4,5,6}
with open(r'D:\cool\login','rt',encoding='utf-8')as x:
    s=x.read()

a=iter(s)
while 1:
    try:
        print(next(a))
    except StopIteration:
        break


# 5、自定义迭代器实现range功能
def m_range(str,stp,ste):
    while str < stp:
        yield str
        str+=ste

for x in m_range(1,10,2):
    print(x)