作业3月20号
1、函数对象优化多分支if的代码练熟
def login(): print('登录') def transfer(): print('转账') def check_banlance(): print('查询余额') def withdraw(): print('提现') def regisster(): print('注册') fanc_dic = { '0':['退出',None], '1':['登录',login], '2':['转账',transfer], '3':['查询余额',check_banlance], '4':['提现', withdraw], '5':['注册', regisster] } while 1: for k in fanc_dic: print(k,fanc_dic[k][0]) choice = input('请输入命令编码：').strip() if not choice.isdigit(): print('请重新输入') continue elif choice == '0': break if choice in fanc_dic: print(fanc_dic[choice][1]()) else: print('指令不存在')
2、编写计数器功能，要求调用一次在原有的基础上加一
温馨提示：
I:需要用到的知识点：闭包函数+nonlocal
II:核心功能如下：
def counter():
x+=1
return x
要求最终效果类似
print(couter()) # 1
print(couter()) # 2
print(couter()) # 3
print(couter()) # 4
print(couter()) # 5
def outer(): x = 0 def counter(): nonlocal x x += 1 return x return counter counter = outer() print(counter())
# ====================周末作业====================
# 编写ATM程序实现下述功能，数据来源于文件db.txt
# 0、注册功能：用户输入账号名、密码、金额，按照固定的格式存入文件db.txt
# 1、登录功能：用户名不存在，要求必须先注册，用户名存在&输错三次锁定，登录成功后记录下登录状态（提示：可以使用全局变量来记录）
下述操作，要求登录后才能操作
# 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
# ====================周末作业==================== # 编写ATM程序实现下述功能，数据来源于文件db.txt # 0、注册功能：用户输入账号名、密码、金额，按照固定的格式存入文件db.txt ''' def user(): username = input('请输入用户名称: ').strip() password = input('请输入用户密码: ').strip() r_password = input('请确认用户密码: ').strip() if password == r_password: print(f'[{username}]注册成功') count=input('请输入存款金额：') with open('db.txt',mode='at',encoding='utf-8') as f1: f1.write('{}:{}:{}'.format(username,password,count)) else: print('注册失败!') user() ''' # 1、登录功能：用户名不存在，要求必须先注册，用户名存在&输错三次锁定，登录成功后记录下登录状态（提示：可以使用全局变量来记录） ''' dic={} with open('db.txt', mode='rt', encoding='utf-8') as f2: for line in f2: user,word=line.strip().split(':') dic[user]=word print(dic) login_user=None def users(): username = input('请输入用户名称: ').strip() if username in dic: password = input('请输入用户密码: ').strip() if password == dic[username]: print('登录成功!') global login_user login_user = username else: print('用户名不存在,请先注册') count = 0 while count < 3: usernames = input('请输入用户名称: ').strip() password = input('请输入用户密码: ').strip() r_password = input('请确认用户密码: ').strip() if password == r_password: print(f'[{usernames}]注册成功') count = input('请输入存款金额：') with open('db.txt', mode='at', encoding='utf-8') as f1: f1.write('{}:{}:{}'.format(usernames, password, count)) else: print('注册失败!') count += 1 continue users() ''' # 下述操作，要求登录后才能操作 # 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 dic={} with open('dbs.txt', mode='rt', encoding='utf-8') as f2: for line in f2: user,word=line.strip().split(':') dic[user]=word print(dic) login_user=None def users(): username = input('请输入用户名称: ').strip() if username in dic: password = input('请输入用户密码: ').strip() if password == dic[username]: print('登录成功!') global login_user login_user = username while True: dics = {} with open('db.txt', mode='rt', encoding='utf-8') as f3: for line2 in f3: user2, money = line2.strip().split(':') dics[user2] = int(money) def transfer(): print('转账') while True: usernameb = input('请输入对方账户名称：') if usernameb == username: print('您不能给自己转账') continue if usernameb not in dics: print('账户不存在') continue else: outcount = input('请输入转账金额：') outcount = int(outcount) user3 = username dics[user3] -= outcount user4 = usernameb dics[user4] += outcount with open('db.txt', mode='wt', encoding='utf-8') as f4: for user2, money in dics.items(): f4.write(f'{user2}:{money}\n') break def check_banlance(): print('查询余额') user2 = username money = dics[user2] print(money) def withdraw(): print('提现') incount = input('请输入提现金额：').strip() incount = int(incount) user2 = username dics[user2] -= incount with open('db.txt', mode='wt', encoding='utf-8') as f6: for user2, money in dics.items(): f6.write(f'{user2}:{money}\n') def recharge(): print('充值') incount = input('请输入充值金额：').strip() incount = int(incount) user2 = username dics[user2] += incount with open('db.txt', mode='wt', encoding='utf-8') as f5: for user2, money in dics.items(): f5.write(f'{user2}:{money}\n') while True: func_dic = { '1': ['退出', None], '2': ['转账', transfer], '3': ['查询余额', check_banlance], '4': ['提现', withdraw], '5': ['充值', recharge] } for k in func_dic: print(k, func_dic[k][0]) cmd = input('请输入命令编号（纯数字）：').strip() if not cmd.isdigit(): print('必须输入纯数字！') continue elif cmd == '1': break elif cmd in func_dic: func_dic[cmd][1]() else: print('输入的指令不存在！') else: print('用户名不存在,请先注册') count = 0 while count < 3: usernames = input('请输入用户名称: ').strip() password = input('请输入用户密码: ').strip() r_password = input('请确认用户密码: ').strip() if password == r_password: print(f'[{usernames}]注册成功') with open('dbs.txt', mode='at', encoding='utf-8') as f1: f1.write('{}:{}\n'.format(usernames, password)) else: print('注册失败!') count += 1 continue users()
