Python Day14 作业

import os
import time

#
# 1、写函数，，用户传入修改的文件名，与要修改的内容，执行函数，完成批了修改操作
# def revise(path, txt, r_txt):
#     with open(path, 'r+')as f:
#         res = f.read()
#         c_res = res.replace(txt, r_txt)
#         f.seek(0)
#         print(c_res)
#         f.write(c_res)
#
#
# path=input('输入路径')
# txt=input('输入更改内容')
# r_txt=input('输入更改后内容')
# revise(path, txt, r_txt)
# 2、写函数，计算传入字符串中【数字】、【字母】、【空格] 以及 【其他】的个数

# txt = input('输入字符串')
#
#
# def count(txt):
#     n_n = 0
#     s_n = 0
#     z_n = 0
#     a_n = 0
#     for i in txt:
#         if i.isdigit():
#             n_n += 1
#         elif i == ' ':
#             s_n += 1
#         elif i.isalpha():
#             z_n += 1
#         else:
#             a_n += 1
#     print(f'数字个数{n_n},其他个数{a_n},空格个数{s_n},字母个数{z_n} ')
#
#
# count(txt)

# 3、写函数，判断用户传入的对象（字符串、列表、元组）长度是否大于5。
#
# def decide(txt):
#     if len(txt) > 5:
#         print('大于5')
#     else:
#         print('小于5')
#
#
# txt = (1, 23, 4, 5, 6, 7)
# decide(txt)
# 4、写函数，检查传入列表的长度，如果大于2，那么仅保留前两个长度的内容，并将新内容返回给调用者。
#
# def change(list):
#     if len(list) > 2:
#         c_list = [x for x in list if list.index(x) < 2]
#     else:
#         print('长度小于2')
#     return c_list
#
#
# list = [1, 23, 45, 5]
# c_list = change(list)
# print(c_list)

# 5、写函数，检查获取传入列表或元组对象的所有奇数位索引对应的元素，并将其作为新列表返回给调用者。
#
# def func(content):
#     n_content = [x for x in content if content.index(x) % 2 != 0]
#     return  n_content
#
#
# print(func(content=[1,23,4,5,6]))
# 6、写函数，检查字典的每一个value的长度,如果大于2，那么仅保留前两个长度的内容，并将新内容返回给调用者。
dic = {"k1": "v1v1", "k2": [11, 22, 33, 44]}


# PS:字典中的value只能是字符串或列表
# def func(dic):
#     for i in dic:
#         value = dic[i]
#         if len(value) > 2 and type(value) == list:
#             n_value = [x for x in value if value.index(x) < 2]
#             dic[i] = n_value
#         if len(value) > 2 and type(value) == str:
#             n_value=value[0:2]
#             dic[i] = n_value
#
#     return dic
#
#
# print(func(dic))
# 选做作业：同昨天
# def login():
#     print('开始登录')
#     login_t = False
#     tag = False
#     count = 0
#     while count < 3:
#         in_name = input('输入名字:')
#         in_password = input('请输入密码:')
#         with open('db.txt', encoding='utf-8')as f, open('.db.txt.swap', mode='w', )as f1:
#             for i in f:
#                 name, password, money, lock = i.strip('\n').split(':')
#                 if in_name == name:
#                     tag = True
#                     print('用户存在,', end='')
#                     if password == in_password and lock == 'lock_on':
#                         print('账号被锁定，无法登陆')
#                         count = 3
#                     elif password == in_password and lock != 'lock_on':
#                         print('登录成功')
#                         count = 3
#                         login_t = True
#                         atm_name = in_name
#                     else:
#                         print('密码错误，三次后将被锁定')
#                         count += 1
#                         if count == 3:
#                             print('三次错误被锁定')
#                             lock = 'lock_on'
#                 i = f'{name}:{password}:{money}:{lock}\n'
#                 f1.write(i)
#             else:
#                 if not tag:
#                     print('用户不存在')
#         os.remove('db.txt')
#         os.rename('.db.txt.swap', 'db.txt')
#     return login_t, atm_name
#
#
# # 4、编写注册功能
# def register():
#     print('注册')
#     in_name = input('输入名字:')
#     in_password = input('请输入密码:')
#     with open('db.txt', mode='a', encoding='utf-8') as f1, open(r'db.txt', encoding='utf-8')as f2:
#         for i in f2:
#             a = i.strip('\n').split(':')
#             if in_name == a[0]:
#                 print('已注册')
#                 break
#         else:
#             f1.write(f'{in_name}:{in_password}:0:lock_off\n')
#             print('注册成功')
#
#
# def out():
#     global tag
#     tag = False
#
#
# def atm(user):
#     atm_f = {
#         1: take_money,
#         2: invest_money,
#         3: remove_money,
#         4: show_money
#     }
#     info = """
#     1 取钱
#     2 充钱
#     3 转钱
#     4 查询余额
#     """
#     print(info)
#     chose = input('输入选择：')
#     if int(chose) in atm_f:
#         atm_f.get(int(chose))(user)
#     else:
#         print('输入不正确的选择')
#
#
# def change_dbm(user, c_money):
#     with open('db.txt', mode='r', encoding='utf-8')as f, \
#             open('.db.txt.swap', mode='w')as f2:
#         for i in f:
#             a = i.strip('\n').split(':')
#             name, password, money, lock = a
#             if user == name:
#                 money = int(money)
#                 money = money + int(c_money)
#             i = f'{name}:{password}:{money}:{lock}\n'
#             f2.write(i)
#     os.remove('db.txt')
#     os.rename('.db.txt.swap', 'db.txt')
#     return money
#
#
# def take_money(user):
#     c_money = input('输入要取的钱')
#     money = -int(c_money)
#     change_dbm(user, money)
#
#
# def invest_money(user):
#     c_money = input('输入要存入的钱')
#     change_dbm(user, c_money)
#
#
# def remove_money(user):
#     pass
#
#
# def show_money(user):
#     print(change_dbm(user))
#
#
# # 5、编写用户认证功能
# res = {
#     out: 0,
#     login: 1,
#     register: 2
# }
# tag = True
# while tag:
#     msg = """
#     0 退出
#     1 登录
#     2 注册
#     """
#     print(msg)
#     cmd = input('请输入命令编号>>: ').strip()
#     for i in res:
#         if str(res.get(i)) == cmd:
#             info = i()
#             if_login, user = info
#             if if_login:
#                 atm(user)

# 选做题：编写ATM程序实现下述功能，数据来源于文件db.txt
# 1、充值功能：用户输入充值钱数，db.txt中该账号钱数完成修改
# 2、转账功能：用户A向用户B转账1000元，db.txt中完成用户A账号减钱，用户B账号加钱
# 3、提现功能：用户输入提现金额，db.txt中该账号钱数减少
# 4、查询余额功能：输入账号查询余额

# 选做题中的选做题：登录功能
# 用户登录成功后，内存中记录下该状态，上述功能以当前登录状态为准，必须先登录才能操作
#