python基础篇 09-文件读写、list练习

pwd.txt文件格式为：

 

 练习1：

import string
"""
需求：
    1、注册的程序，账号和密码存在文件里面
    1、最多输入3次
    2、输入账号和密码、确认密码，密码长度要在6-12位之间
    2.1（密码包含大写字母、小写字母、数字，选做）
    3、账号/密码/确认密码输入为空要提示
    4、用户已经存在不能注册
    5、两次密码要输入一致
"""
def username_pwd_valid(usrinfo):
    if len(list(filter(lambda c:c in string.digits,usrinfo))) and len(list(filter(lambda c:c in string.ascii_lowercase,usrinfo))) and len(list(filter(lambda c:c in string.ascii_uppercase,usrinfo))):
        return True
    return False
def get_username():
    with open('pwd.txt', encoding='utf-8') as f:
        content = f.readlines()
        usr_names = list(map(lambda usr_pwd: usr_pwd.strip().split(',')[0], content))
        return usr_names
USR_NAMES = get_username()
for i in range(3):
    username = input("请输入用户名：").strip()
    passwd = input("请输入密码：").strip()
    confirmpwd = input("请输入确认密码：").strip()
    if not (username and passwd and confirmpwd):
        print("用户名/密码/确认密码任意一个都不能为空")
    elif passwd != confirmpwd:
        print("密码和确认密码不一致！")
    elif not ((len(username) >=6 and len(username) <= 12) and (len(passwd) >= 6 and len(passwd) <= 12)):
        print("用户名、密码、确认密码长度要再6-12之间")
    elif not (username_pwd_valid(username) and username_pwd_valid(passwd)):
        print("用户名、密码、确认密码必须包含大小写字母和数字！")
    else:
        if username in USR_NAMES:
            print(f"此{username}用户已经存在！")
        else:
            with open('pwd.txt', 'a+', encoding='utf-8') as f:
                write_content = ','.join([username, passwd + '\n'])
                f.writelines(write_content)
                # 或者
                # write_content = username+','+passwd+'\n'
                # f.write()
                print(f"添加用户{username},{passwd}成功！")
                break

else:
    print("注册次数超限！")

练习2：

  第一种解决方案：

import string
"""
需求：
    2、登录，账号密码从文件里面取
    1、最多输入3次
    2、账号/密码的为空校验
    3、账号不存在要提示
    4、登录成功结束
"""
with open('pwd.txt', encoding='utf-8') as fr:
    content = fr.readlines()
    usr_name_list = list(map(lambda user_info: user_info.strip().split(',')[0], content))
    pwd_list = list(map(lambda user_info: user_info.strip().split(',')[1], content))
for i in range(3):
    username = input("请输入用户名：").strip()
    password = input("请输入密码：").strip()
    if not(username and password):
        print("用户名和密码都不能为空！")
    else:
        if username not in usr_name_list:
            print(f"用户名{username}不存在！")
        else:
            pwd = pwd_list[usr_name_list.index(username)]
            if pwd == password:
                print(f"用户{username}登陆成功！")
                break
            else:
                print("用户名密码错误，登陆失败哦！")

else:
    print("登陆次数超限")

第二种解决方案：

 # 另一种解决方案：
USER_INFO = {}
with open(r'b.txt',encoding='utf-8') as fr:
    line = fr.readline()
    if line:
        uname = line.strip().split(',')[0]
        upwd = line.strip().split(',')[1]
        USER_INFO[uname] = upwd
for i in range(3):
    username = input("请输入用户名：").strip()
    password = input("请输入密码：").strip()
    if not (username and password):
        print("用户名和密码都不能为空！")
    else:
        if username not in USER_INFO:
            print(f"用户名{username}不存在！")
        elif USER_INFO.get(username) != password:
            print("用户名密码错误，登陆失败哦！")
        else:
            print(f"用户{username}登陆成功！")
            break
else:
    print("登陆次数超限")

练习3：

1、监控日志文件，找到每分钟请求大于200的ip地址，加入黑名单
日志文件格式为：

 

 

import collections
import time

file_pointer = 0
# ip_dict = collections.defaultdict(int)
while True:
    # ips = {}
    ips = collections.defaultdict(int)
    # f = open('access.log',encoding='utf-8')
    # f.seek(file_pointer)
    # for line in f:
    #     ip = line.strip().split()[0]
    #     if ip in ips:
    #         ips[ip] += 1
    #     else:
    #         ips[ip] = 1
    # file_pointer = f.tell()
    # f.close()
    # for ip in ips:
    #     if ips[ip] >= 200:
    #         print(f"要加入黑名單的ip地址是：{ip}")
    # time.sleep(5)

    with open('access.log',encoding='utf-8') as f:
        f.seek(file_pointer)
        for line in f:
            ip = line.strip().split()[0]
            ips[ip] += 1
            # if ip in ips:
            #     ips[ip] += 1
            # else:
            #     ips[ip] = 1
        file_pointer = f.tell()
        for ip in ips:
            if ips[ip] >= 200:
                print(f"要加入黑名單的ip地址是：{ip}")
    time.sleep(5)