Day11作业

'''
#1、通用文件copy工具实现
old_file = input('请输入原文件地址：').strip()
new_file = input('请输入目标地址：').strip()
with open(r'%s' %old_file,'rb') as rf, open(r'%s' %new_file, 'wb') as wf:
    for line in rf:
        wf.write(line)

#2、基于seek控制指针移动，测试r+、w+、a+模式下的读写内容
with open('a.txt', 'r+', encoding='utf-8') as rf:
    rf.seek(5,0)
    print(rf.read())
    rf.write('ko')

with open('a.txt', 'w+', encoding='utf-8') as wf:
    wf.seek(0,1)
    wf.write('hhhoo你好')
    print(wf.read())

with open('a.txt', 'a+', encoding='utf-8') as wf:
    wf.seek(-6,2)
    wf.write('hhhoo你好')
    print(wf.read())

#3、tail -f access.log程序实现
import time
for i in range(1000000):
    with open('access.log', 'at', encoding='utf-8') as f:
        t = time.strftime('%Y-%m-%d %H:%M:%S')
        msg = '我刚刚赚了%s个亿' % i
        n =f'{t} {msg}\n'
        f.write(n)
    time.sleep(3)

import time

with open('access.log', 'rb') as f:
    f.seek(0,2)
    while True:
        line = f.readline()
        if len(line) == 0:
            time.sleep(1)
        else:
            print(line.decode('utf-8'))

#4、
# 4.1：编写用户登录接口

inp_name = input('your name:').strip()
inp_pwd = input('your password:').strip()
with open('db.txt','r',encoding='utf-8') as f:
        for i in f:
                name,pwd = i.strip('\n').split(':')
                if name == inp_name and pwd == inp_pwd:
                        print('login successful!')
                        break
        else:
                print('name or password error!')

# 4.2：编写程序实现用户注册后（注册到文件中），可以登录（登录信息来自于文件）
print('注册'.center(50,'='))
with open('db.txt', 'a', encoding='utf-8') as af:
        inp_name = input('your name:').strip()
        inp_pwd = input('your password:').strip()
        msg = '%s:%s\n'%(inp_name,inp_pwd)
        af.write(msg)
        print('注册成功！')
print('登录'.center(50,'='))
with open('db.txt','r',encoding='utf-8') as rf:
        user_name = input('your name:').strip()
        user_pwd = input('your password:').strip()
        for line in rf:
                name,pwd = line.strip('\n').split(':')
                if name == user_name and pwd == user_pwd:
                        print('login successful!')
                        break
        else:
                print('name or password error!')

#5、下属两个案例的升级需求完成
# 示范1：注册功能
# name = input("your name: ").strip()
# 做合法性校验：
# 1、如果输入的用户名包含特殊字符^$&...让用户重新输入
# 2、如果输入的用户名已经存在也重新输入
# pwd = input("your password: ").strip()
# 做合法性校验：
# 1、密码长度
# 2、如果密码包含特殊字符则重新输入
# f.txt = open('user.txt',mode='at',encoding='utf-8')
# f.txt.write('%s:%s\n' %(name,pwd))
# f.txt.close()
print('注册'.center(50,'='))
tag = True
while tag:
        inp_name = input('your name:').strip()
        if inp_name.isalnum():
                with open('db.txt', 'r', encoding='utf-8') as rf:
                        for line in rf:
                                name, pwd = line.strip('\n').split(':')
                                if inp_name in name:
                                        print('用户名重复,请重新输入')
                                        break
                        else:
                                while True:
                                        with open('db.txt', 'a', encoding='utf-8') as af:
                                                inp_pwd = input('your password:').strip()
                                                if inp_pwd.isalnum():
                                                        if len(inp_pwd) < 6:
                                                                print('密码太短，请重新输入')
                                                        else:
                                                                msg = '%s:%s\n' % (inp_name, inp_pwd)
                                                                af.write(msg)
                                                                print('注册成功！')
                                                                tag = False
                                                                break
                                                else:
                                                        print('包含非法字符，请重新输入')

        else:
                print('包含非法字符,请重新输入')



'''
# 示范2：登录功能
# 升级需求1：同一个账号输错三次则退出
# 升级需求2：同一个账号输错三次则，该账号则锁定10秒，即便程序被终止，仍然计时
# import time
# t = time.strftime('%S')
# print(t)
#
d = {}
tag = True

while tag:
    inp_name = input("your name: ").strip()
    inp_pwd = input('your password:').strip()
    d[inp_name] = {'error': 0}
    with open('db.txt', 'r') as f:
        for line in f:
            user, pwd = line.strip('\n').split(':')
            if inp_name == user:
                if inp_pwd == pwd:
                    print('login successful')
                    tag = False
                    break
            else:
                    d[inp_name]['error'] += 1
                    print('user or password error')
                    print(d)
                    break