内容:
1.修改个人信息程序
2.员工信息增删改查
一、修改个人信息程序
需求:
1 在一个文件中存入多个人的个人信息，如以下: 2 username password age position department 3 alex abc123 21 Engineer IT 4 rain xyz456 32 Teacher Teaching 5 6 功能: 7 1.输入用户名及密码，正确登陆系统后显示 8 (1)修改个人信息 9 (2)打印个人信息 10 (3)修改密码 11 2.上述每个选项写一个方法 12 3.登陆输错3次退出程序
实现1:
1 # 员工信息文件 -> info_employee.txt 2 3 # 员工信息(列表嵌套) -> [ "alex", "abc123", 21, "Engineer", "IT"] 4 info = [] 5 6 7 # 获取员工信息 8 def get_info(): 9 with open("info_employee.txt", 'r', encoding="utf-8") as f: 10 # 读取每一行的数据存入列表中 11 details = f.readlines() 12 # 遍历列表将每一行的数据分开并将一行的数据作为一个列表存入info列表中 13 for detail in details: 14 detail = detail.strip().split() 15 info.append(detail) 16 17 18 # 登陆 19 def login(): 20 users_pwds = [] 21 # 获取用户名及密码: 22 for index in range(1, len(info)): 23 # 获取用户数据 24 detail = info[index] 25 # 获取用户名及密码 26 user = detail[0] 27 pwd = detail[1] 28 users_pwds.append(dict({user: pwd})) 29 # 输入用户名及密码并验证用户名及密码是否正确 30 for i in range(4): 31 if i == 3: 32 print("你已经输错3次，不能再登陆了!") 33 exit() 34 # 输入用户名及密码 35 36 username, password = input("input the username and password(eg: user pwd): ").strip().split() 37 for item in users_pwds: 38 if item.get(username, None) == password: 39 print("登陆成功!欢迎%s!" % username) 40 now_user = username 41 return now_user 42 else: 43 print("用户名或密码错误!请重新输入") 44 45 46 # 打印选项 47 def output_chose(): 48 # 打印选项 49 print("你有如下选项: ") 50 print("1.修改个人信息") 51 print("2.打印个人信息") 52 print("3.修改密码") 53 print("4.退出系统") 54 # 用户输入选项，函数返回选项对应的整数 55 while True: 56 choice = input("请输入选项(数字): ") 57 if choice.isdigit(): 58 choice = int(choice) 59 if 1 <= choice <= 4: 60 return choice 61 else: 62 print("请输入正确的数字选项!") 63 else: 64 print("请输入正确的数字选项!") 65 continue 66 67 68 # 将修改后的信息写入文件中 69 def write_info(): 70 with open("info_employee.txt", "w", encoding="utf-8") as f: 71 for item in info: 72 for value in item: 73 f.write(str(value)+" ") 74 f.write(" ") 75 76 77 # 1.修改个人信息 78 def change_info(update_name): 79 index = 0 80 for personal in info: 81 if personal[0] == update_name: 82 for i in range(len(personal)): 83 print(i+1, info[0][i], ": ", personal[i]) 84 choice = int(input("请输入你想要修改的选项: ")) 85 print("修改前的值: ", info[index][choice-1]) 86 change = input("请输入修改后的值: ") 87 info[index][choice-1] = change 88 write_info() 89 index += 1 90 91 92 # 2.打印个人信息 93 def output_info(personal_name): 94 for personal in info: 95 if personal[0] == personal_name: 96 for i in range(len(personal)): 97 print(info[0][i], ": ", personal[i]) 98 99 100 # 3.修改密码 101 def change_pwd(change_name): 102 index = 0 103 # 遍历找到用户信息的位置 104 for item in info: 105 if item[0] == change_name: 106 break 107 index += 1 108 # 输入两次密码，一样就通过，否则就重新输入 109 while True: 110 pwd1 = input("请输入新密码: ") 111 pwd2 = input("请再一次输入新密码: ") 112 if pwd1 == pwd2: 113 info[index][1] = pwd1 114 print("密码输入正确,修改密码成功!") 115 write_info() 116 break 117 else: 118 print("两次输入的密码不一样请重新输入!") 119 120 121 if __name__ == '__main__': 122 get_info() 123 login_user = login() 124 while True: 125 number = output_chose() 126 if number == 1: 127 change_info(login_user) 128 if number == 2: 129 output_info(login_user) 130 if number == 3: 131 change_pwd(login_user) 132 if number == 4: 133 exit()
实现2：
1 # __author__ = "wyb" 2 # date: 2018/4/20 3 4 5 def get_info(): 6 """ 7 获取员工信息 8 :return: 返回列表，列表中每一项是存储员工信息的字典 9 """ 10 info = [] 11 with open("info_employee.txt", 'r', encoding="utf-8") as f: 12 # 读取每一行的数据存入列表中 13 details = f.readlines() 14 topics = details[0].split() # 第一排数据作为键 15 for index in range(1, len(details)): # 第二排开始的数据作为值 16 detail = details[index].strip().split() 17 dic = dict(zip(topics, detail)) # 把两个列表合并为一个字典 18 dic["user_id"] = index # 向用户数据中添加一项user_id方便替换用户数据 19 info.append(dic) 20 return info 21 22 23 def write_info(user_data): 24 """ 25 将修改后的用户信息写入文件中 26 :param user_data: 用户信息 27 :return: 28 """ 29 data = get_info() # 获取文件中数据 30 for index in range(len(data)): # 替换用户数据 31 if data[index]["user_id"] == user_data["user_id"]: 32 data[index] = user_data 33 34 with open("info_employee.txt", 'w', encoding="utf-8") as f: # 将数据写入新文件 35 f.write("username password age position department ") 36 for item in data: 37 f.write("%s %s %s %s %s " % (item["username"], item["password"], item["age"], item["position"], item["department"])) 38 39 return 40 41 42 def login(info): 43 """ 44 登陆接口 45 :param info: 个人信息所有数据 46 :return: 返回状态及信息 47 """ 48 # 输入用户名及密码并验证用户名及密码是否正确 49 for i in range(4): 50 if i == 3: 51 return {"status": -1, "error": "输错3次，不能再登陆"} 52 # 输入用户名及密码 53 username = input("username>>>").strip() 54 password = input("password>>>").strip() 55 for item in info: 56 if item["username"] == username and item["password"] == password: # 登陆成功 57 return {"status": 0, "msg": "欢迎%s登陆" % username, "username": username} 58 else: 59 print("用户名或密码错误!请重新输入") 60 61 62 def output_info(user_info): 63 """ 64 打印个人信息 65 :param user_info: 某个用户的个人信息 66 :return: 67 """ 68 print("USER INFO".center(50, "-")) 69 for k, v in user_info.items(): 70 print("%18s: %s" % (k, v)) 71 print("END".center(50, "-")) 72 return 73 74 75 def change_info(user_info): 76 """ 77 修改个人信息 78 :param user_info: 某个用户的个人信息 79 :return: 80 """ 81 print("选择你要修改的个人信息: ") 82 dic = {} 83 for index, item in enumerate(user_info.keys()): # 输出个人信息及选项，并将个人信息和选项捆绑 84 if item == "user_id": 85 continue 86 print("%s: %s" % (index+1, item)) 87 dic[str(index+1)] = item 88 choice = input("输入选项>>>").strip() 89 change = input("输入修改后的值>>>").strip() 90 user_info[dic[str(choice)]] = change # 修改信息 91 write_info(user_info) # 修改后的信息写入文件 92 return 93 94 95 def change_pwd(user_info): 96 """ 97 修改用户的密码 98 :param user_info: 某个用户的个人信息 99 :return: 100 """ 101 retry_times = 0 # 最多允许尝试3次 102 while True: 103 retry_times += 1 104 pwd = input("输入修改后的密码: ").strip() 105 pwd_again = input("再次输入密码: ").strip() 106 if pwd == pwd_again: 107 user_info["password"] = pwd 108 write_info(user_info) # 将修改后的数据写入文件 109 print("两次输入密码相符，修改成功") 110 return 111 else: 112 print("两次密码输入不符，请重新输入密码") 113 114 115 def controller(all_info, username): 116 """ 117 功能分发器 118 :param all_info: 所有用户信息 119 :param username: 登陆用户的用户名 120 :return: 121 """ 122 user_data = {} # 登陆用户的个人信息 123 menus = [ # 功能菜单 124 ("修改个人信息", change_info), 125 ("输出个人信息", output_info), 126 ("修改密码", change_pwd), 127 ("退出系统", 0), 128 ] 129 for item in all_info: # 根据用户名找到某个用户的用户信息 130 if item["username"] == username: 131 user_data = item 132 while True: 133 for index, item in enumerate(menus): # 输出功能菜单 134 print(index + 1, item[0]) 135 choice = input("请输入序号选择功能>>>") 136 if choice.isdigit(): 137 choice = int(choice) 138 if 1 <= choice < len(menus): 139 # 调用相应的功能函数 140 menus[choice-1][1](user_data) 141 elif choice == len(menus): 142 exit("退出系统") 143 if not choice: 144 continue 145 146 147 def entrance(): 148 """ 149 程序主入口 150 :return: 151 """ 152 details = get_info() # 获取所有数据 153 res = login(details) # 调用登陆接口 154 username = "" 155 if res["status"] == 0: # 成功登陆 156 username = res["username"] # 获取登陆的用户的用户名 157 print(res["msg"]) 158 else: # 登陆失败 159 print(res) 160 exit() 161 controller(details, username) # 调用功能分发器 162 163 164 if __name__ == '__main__': 165 entrance()
二、员工信息增删改查
需求：
实现:
这个题说白了就算麻烦，用笨办法也可以做出来，以下代码是我个人的实现，不同的人有不同的理解，实现也许有不同
整体思路: 在文件中存储员工信息，一个函数读取所有员工信息，并只在程序启动时读取，输入命令后根据不同命令调用不同函数来处理，如果命令是修改或增加或删除，在执行命令后将修改后的员工信息写入文件中
文件结构:
1 1,Alex Li,22,13651054608,IT,2013-04-01 2 2,wyb,20,15698704367,CTO,2016-8-9 3 3,tim,26,18945312218,HR,2015-9-3 4 4,Eric,30,18796342152,IT,2012-4-6 5 5,rachel,32,15367833458,Market,2013-9-3 6 6,jack,22,18398035682,HR,2016-7-6
测试命令:
1 find: 2 find * from staff_table 3 find name,age from staff_table 4 find name,age from staff_table where age > 22 5 find * from staff_table where dept = "IT" 6 find * from staff_table where enroll_date like "2013" 7 8 add: 9 add staff_table Alex Li,25,13651054608,IT,2016-7-8 10 add staff_table Alex Li,25,13444679873,IT,2016-7-8 11 add staff_table woz,20,13594372910,IT,2016-9-1 12 13 del: 14 del from staff_table where id=3 15 del from staff_table where id=13 16 17 update: 18 update staff_table set dept = "market" where dept = "IT" 19 update staff_table set age = 25 where name = "Alex Li"
输入命令并进行相关处理:
1 # 根据命令选择相应函数 2 def chose_command(commands): 3 command = commands[0] 4 if command == "find": 5 find(commands) 6 if command == "add": 7 add(commands) 8 if command == "del": 9 delete(commands) 10 if command == "update": 11 update(commands) 12 13 14 # 输入命令并进行相关处理 15 def input_command(): 16 while True: 17 command = input("请输入与增删改查相关命令(q或exit退出程序): ") 18 # 退出程序 19 if command == "exit" or command == "q": 20 exit() 21 # 将字母统一转换成小写 22 order = "" 23 for i in range(len(command)): 24 if command[i].isalpha(): 25 order += command[i].lower() 26 else: 27 order += command[i] 28 command = order 29 # 分割字符串 30 command = command.split() 31 orders = ["find", "del", "add", "update"] 32 # 确保命令的首个单词正确 33 if command[0] not in orders: 34 print("请输入正确的命令!") 35 continue 36 # 选择命令 37 chose_command(command)
查找及修改:
1 # 输出查找及修改结果 2 def output_result(res, flag): 3 print("一共%s了%d条数据" % (flag, len(res))) 4 if len(res) != 0: 5 print("%s如下:" % flag) 6 for s in res: 7 print(s) 8 9 10 def find_condition(rows, choice): 11 # 存储符合条件的行 12 res = [] 13 c1, c2, c3 = choice[0], choice[1], choice[2] 14 # 处理c3 15 if c3.isdigit(): 16 c3 = int(c3) 17 else: 18 c3 = c3.strip(""") 19 # print(c3) 20 if c2 == "=": 21 for row in rows: 22 item = str(row[c1]) 23 # 数字 24 if item.isdigit(): 25 if int(item) == c3: 26 res.append(row) 27 # 字符串 28 elif item.lower() == c3: 29 res.append(row) 30 if c2 == ">": 31 for row in rows: 32 if row[c1] > c3: 33 res.append(row) 34 if c2 == ">=": 35 for row in rows: 36 if row[c1] >= c3: 37 res.append(row) 38 if c2 == "<": 39 for row in rows: 40 if row[c1] < c3: 41 res.append(row) 42 if c2 == "<=": 43 for row in rows: 44 if row[c1] <= c3: 45 res.append(row) 46 if c2 == "like": 47 for row in rows: 48 if c3 in row[c1]: 49 res.append(row) 50 output_result(res, "查找") 51 52 53 def find(commands): 54 # find * from staff_table 55 # find name,age from staff_table 56 if len(commands) == 4: 57 # 列 58 column = commands[1] 59 # 表 60 table = commands[3] 61 models = tables[table] 62 if column == '*': 63 output_result(models, "查找") # 输出结果 64 else: 65 res = [] # 存储选择的列 66 columns = column.split(',') # 选择的列 67 # 提取选择的列 68 for model in models: 69 res_dict = {} 70 for item in columns: 71 res_dict[item] = model[item] 72 res.append(res_dict) 73 output_result(res, "查找") # 输出结果 74 # find name,age from staff_table where age > 22 75 # find * from staff_table where dept = "IT" 76 # find * from staff_table where enroll_date like "2013" 77 elif len(commands) == 8: 78 column, table = commands[1], commands[3] # 列名和表名 79 choice = commands[-3::1] # 筛选条件 80 # print(column, table, chose1, chose2, chose3) 81 # 表 82 models = tables[table] 83 if column == '*': 84 find_condition(models, choice) # 根据条件查找 85 else: 86 res = [] # 存储选择的列 87 columns = column.split(',') # 选择的列 88 # 提取选择的列 89 for model in models: 90 res_dict = {} 91 for item in columns: 92 res_dict[item] = model[item] 93 res.append(res_dict) 94 find_condition(res, choice) # 根据条件查找 95 96 def update(commands): 97 # update staff_table set dept = "market" where dept = "IT" 98 # update staff_table set age = 25 where name = "Alex Li" 99 res = [] # 存储修改过的行 100 # 表 101 table = commands[1] 102 models = tables[table] 103 condition = commands[7::] # 选择行的条件 104 change = (commands[3], commands[5]) # 要修改的键以及其对应值 105 # 处理条件 106 if condition[0] == "id": 107 print("不能修改id!") 108 return 109 if len(condition) == 3: 110 if condition[2].isdigit(): 111 condition[2] = int(condition[2]) 112 else: 113 condition[2] = condition[2].strip(""") 114 if len(condition) == 4: 115 condition[2] = condition[2] + " " + condition[3] 116 condition[2] = condition[2].strip(""") 117 # print(condition) 118 # 根据条件选择表中的行 119 for index in range(len(models)): 120 dic = models[index][condition[0]] 121 if str(dic).lower() == condition[2]: 122 res.append(models[index]) 123 # 修改相应的值 124 for index in range(len(res)): 125 value = change[1] # 要修改的值 126 if value.isdigit(): 127 value = int(value) 128 else: 129 value = value.strip(""") 130 res[index][change[0]] = value 131 # 输出修改结果 132 output_result(res, "修改") 133 # 将修改结果存入文件中(根据id值将修改后的行赋给表中的行) 134 for i in range(len(models)): 135 for item in res: 136 mid = models[i]["id"] 137 if mid == item["id"]: 138 models[i] = item 139 write_info(models)
删除及增加:
1 def add(commands): 2 # add staff_table Alex Li,25,13444679873,IT,2016-7-8 3 # add staff_table woz,20,13594372910,IT,2016-9-1 4 # 表 5 table = commands[1] 6 models = tables[table] 7 # 待添加的员工信息 8 add_details = commands[2:] 9 details = [] 10 # 处理数据 11 if len(add_details) == 1: 12 details = add_details[0].split(',') 13 if len(add_details) == 2: 14 details = add_details[1].split(',') 15 details[0] = add_details[0] + " " + details[0] 16 # print(models) 17 # print(details[3]) 18 # 判断员工信息是否可以添加进表 19 if details[2] not in tels: 20 print("新增一条员工信息") 21 else: 22 print("电话号重复,无法新增员工信息!") 23 return 24 # 获取id值 25 aid = models[-1]["id"] + 1 26 # 将可添加的员工信息加入新字典中 27 new_dict = {} 28 new_dict.update(id=aid, name=details[0], age=int(details[1]), tel=details[2], dept=details[3], enroll_date=details[4]) 29 # 将新字典加入表中 30 models.append(new_dict) 31 # 写入数据 32 write_info(models) 33 34 def delete(commands): 35 # del from staff_table where id=3 36 # del from staff_table where id=13 37 # 表 38 table = commands[2] 39 models = tables[table] 40 # 选择条件 41 condition = commands[-1] 42 # print(table, condition) # 表名和条件 43 if "=" in condition: 44 conditions = condition.split('=') 45 # print(conditions) 46 for index in range(len(models)): 47 if models[index]["id"] == int(conditions[1]): 48 print("删除一条员工信息,删除信息如下:") 49 print(models[index]) 50 del models[index] 51 break 52 else: 53 print("请输入正确的del命令!") 54 return 55 write_info(models) 56 else: 57 print("请输入正确的del命令!") 58 return
文件读取及写入:
1 # 表结构: tables -> staff_table -> employee_detail 2 # 全局变量: 3 tables = {} 4 tels = [] # 字符串存储员工的电话号 5 6 7 # 获取员工信息 8 def get_info(): 9 with open("employee_info.txt", 'r', encoding="utf-8") as f: 10 # staff_table存储多行员工信息，每一行的员工信息存在字典中 11 staff_table = [] 12 # 读取每一行的数据存入列表中 13 details = f.readlines() 14 # 遍历列表将每一行的数据分开并将一行的数据作为一个字典存入info列表中 15 for detail in details: 16 employee_detail = {} 17 detail = detail.strip() 18 items = detail.split(',') 19 # 去掉开头和结尾的空白 20 for i in range(len(items)): 21 items[i] = items[i].strip() 22 # 将一条员工信息存入字典 23 employee_detail.update(id=int(items[0]), name=items[1], age=int(items[2]), tel=items[3], dept=items[4], enroll_date=items[5]) 24 tels.append(items[3]) 25 staff_table.append(employee_detail) 26 tables.update(staff_table=staff_table) 27 # print(tables) 28 # print(tables["staff_table"]) 29 30 31 # 将员工信息写入文件中 32 def write_info(models): 33 with open("employee_info.txt", "w", encoding="utf-8") as f: 34 for model in models: 35 f.write(str(model["id"]) + "," + model["name"] + "," + str(model["age"]) + ",") 36 f.write(model["tel"] + "," + model["dept"] + "," + model["enroll_date"] + " ")
全部代码:
1 # __author__ = "wyb" 2 # date: 2018/4/22 3 4 # 表结构: tables -> staff_table -> employee_detail 5 tables = {} 6 tels = [] # 字符串存储员工的电话号 7 8 9 # 获取员工信息 10 def get_info(): 11 with open("employee_info.txt", 'r', encoding="utf-8") as f: 12 # staff_table存储多行员工信息，每一行的员工信息存在字典中 13 staff_table = [] 14 # 读取每一行的数据存入列表中 15 details = f.readlines() 16 # 遍历列表将每一行的数据分开并将一行的数据作为一个字典存入info列表中 17 for detail in details: 18 employee_detail = {} 19 detail = detail.strip() 20 items = detail.split(',') 21 # 去掉开头和结尾的空白 22 for i in range(len(items)): 23 items[i] = items[i].strip() 24 # 将一条员工信息存入字典 25 employee_detail.update(id=int(items[0]), name=items[1], age=int(items[2]), tel=items[3], dept=items[4], enroll_date=items[5]) 26 tels.append(items[3]) 27 staff_table.append(employee_detail) 28 tables.update(staff_table=staff_table) 29 # print(tables) 30 # print(tables["staff_table"]) 31 32 33 # 将员工信息写入文件中 34 def write_info(models): 35 with open("employee_info.txt", "w", encoding="utf-8") as f: 36 for model in models: 37 f.write(str(model["id"]) + "," + model["name"] + "," + str(model["age"]) + ",") 38 f.write(model["tel"] + "," + model["dept"] + "," + model["enroll_date"] + " ") 39 40 41 # 输出查询及修改结果 42 def output_result(res, flag): 43 print("一共%s了%d条数据" % (flag, len(res))) 44 if len(res) != 0: 45 print("%s如下:" % flag) 46 for s in res: 47 print(s) 48 49 50 def find_condition(rows, choice): 51 # 存储符合条件的行 52 res = [] 53 c1, c2, c3 = choice[0], choice[1], choice[2] 54 # 处理c3 55 if c3.isdigit(): 56 c3 = int(c3) 57 else: 58 c3 = c3.strip(""") 59 # print(c3) 60 if c2 == "=": 61 for row in rows: 62 item = str(row[c1]) 63 # 数字 64 if item.isdigit(): 65 if int(item) == c3: 66 res.append(row) 67 # 字符串 68 elif item.lower() == c3: 69 res.append(row) 70 if c2 == ">": 71 for row in rows: 72 if row[c1] > c3: 73 res.append(row) 74 if c2 == ">=": 75 for row in rows: 76 if row[c1] >= c3: 77 res.append(row) 78 if c2 == "<": 79 for row in rows: 80 if row[c1] < c3: 81 res.append(row) 82 if c2 == "<=": 83 for row in rows: 84 if row[c1] <= c3: 85 res.append(row) 86 if c2 == "like": 87 for row in rows: 88 if c3 in row[c1]: 89 res.append(row) 90 output_result(res, "查找") 91 92 93 def find(commands): 94 # find * from staff_table 95 # find name,age from staff_table 96 if len(commands) == 4: 97 # 列 98 column = commands[1] 99 # 表 100 table = commands[3] 101 models = tables[table] 102 if column == '*': 103 output_result(models, "查找") # 输出结果 104 else: 105 res = [] # 存储选择的列 106 columns = column.split(',') # 选择的列 107 # 提取选择的列 108 for model in models: 109 res_dict = {} 110 for item in columns: 111 res_dict[item] = model[item] 112 res.append(res_dict) 113 output_result(res, "查找") # 输出结果 114 # find name,age from staff_table where age > 22 115 # find * from staff_table where dept = "IT" 116 # find * from staff_table where enroll_date like "2013" 117 elif len(commands) == 8: 118 column, table = commands[1], commands[3] # 列名和表名 119 choice = commands[-3::1] # 筛选条件 120 # print(column, table, chose1, chose2, chose3) 121 # 表 122 models = tables[table] 123 if column == '*': 124 find_condition(models, choice) # 根据条件查找 125 else: 126 res = [] # 存储选择的列 127 columns = column.split(',') # 选择的列 128 # 提取选择的列 129 for model in models: 130 res_dict = {} 131 for item in columns: 132 res_dict[item] = model[item] 133 res.append(res_dict) 134 find_condition(res, choice) # 根据条件查找 135 136 137 def add(commands): 138 # add staff_table Alex Li,25,13444679873,IT,2016-7-8 139 # add staff_table woz,20,13594372910,IT,2016-9-1 140 # 表 141 table = commands[1] 142 models = tables[table] 143 # 待添加的员工信息 144 add_details = commands[2:] 145 details = [] 146 # 处理数据 147 if len(add_details) == 1: 148 details = add_details[0].split(',') 149 if len(add_details) == 2: 150 details = add_details[1].split(',') 151 details[0] = add_details[0] + " " + details[0] 152 # print(models) 153 # print(details[3]) 154 # 判断员工信息是否可以添加进表 155 if details[2] not in tels: 156 print("新增一条员工信息") 157 else: 158 print("电话号重复,无法新增员工信息!") 159 return 160 # 获取id值 161 aid = models[-1]["id"] + 1 162 # 将可添加的员工信息加入新字典中 163 new_dict = {} 164 new_dict.update(id=aid, name=details[0], age=int(details[1]), tel=details[2], dept=details[3], enroll_date=details[4]) 165 # 将新字典加入表中 166 models.append(new_dict) 167 # 写入数据 168 write_info(models) 169 170 171 def delete(commands): 172 # del from staff_table where id=3 173 # del from staff_table where id=13 174 # 表 175 table = commands[2] 176 models = tables[table] 177 # 选择条件 178 condition = commands[-1] 179 # print(table, condition) # 表名和条件 180 if "=" in condition: 181 conditions = condition.split('=') 182 # print(conditions) 183 for index in range(len(models)): 184 if models[index]["id"] == int(conditions[1]): 185 print("删除一条员工信息,删除信息如下:") 186 print(models[index]) 187 del models[index] 188 break 189 else: 190 print("请输入正确的del命令!") 191 return 192 write_info(models) 193 else: 194 print("请输入正确的del命令!") 195 return 196 197 198 def update(commands): 199 # update staff_table set dept = "market" where dept = "IT" 200 # update staff_table set age = 25 where name = "Alex Li" 201 res = [] # 存储修改过的行 202 # 表 203 table = commands[1] 204 models = tables[table] 205 condition = commands[7::] # 选择行的条件 206 change = (commands[3], commands[5]) # 要修改的键以及其对应值 207 # 处理条件 208 if condition[0] == "id": 209 print("不能修改id!") 210 return 211 if len(condition) == 3: 212 if condition[2].isdigit(): 213 condition[2] = int(condition[2]) 214 else: 215 condition[2] = condition[2].strip(""") 216 if len(condition) == 4: 217 condition[2] = condition[2] + " " + condition[3] 218 condition[2] = condition[2].strip(""") 219 # print(condition) 220 # 根据条件选择表中的行 221 for index in range(len(models)): 222 dic = models[index][condition[0]] 223 if str(dic).lower() == condition[2]: 224 res.append(models[index]) 225 # 修改相应的值 226 for index in range(len(res)): 227 value = change[1] # 要修改的值 228 if value.isdigit(): 229 value = int(value) 230 else: 231 value = value.strip(""") 232 res[index][change[0]] = value 233 # 输出修改结果 234 output_result(res, "修改") 235 # 将修改结果存入文件中(根据id值将修改后的行赋给表中的行) 236 for i in range(len(models)): 237 for item in res: 238 mid = models[i]["id"] 239 if mid == item["id"]: 240 models[i] = item 241 write_info(models) 242 243 244 # 根据命令选择相应函数 245 def chose_command(commands): 246 command = commands[0] 247 if command == "find": 248 find(commands) 249 if command == "add": 250 add(commands) 251 if command == "del": 252 delete(commands) 253 if command == "update": 254 update(commands) 255 256 257 # 输入命令并进行相关处理 258 def input_command(): 259 while True: 260 command = input("请输入与增删改查相关命令(q或exit退出程序): ") 261 # 退出程序 262 if command == "exit" or command == "q": 263 exit() 264 # 将字母统一转换成小写 265 order = "" 266 for i in range(len(command)): 267 if command[i].isalpha(): 268 order += command[i].lower() 269 else: 270 order += command[i] 271 command = order 272 # 分割字符串 273 command = command.split() 274 orders = ["find", "del", "add", "update"] 275 # 确保命令的首个单词正确 276 if command[0] not in orders: 277 print("请输入正确的命令!") 278 continue 279 # 选择命令 280 chose_command(command) 281 282 283 if __name__ == '__main__': 284 get_info() 285 input_command()