手把手教你做python学生管理系统

password = input('请输入密码：') self.users_database[username] = password print(f"用户{username}注册成功!")

for i in range(3): # 0, 1, 2 username = input("请输入用户名：")

# 先检查用户是否注册if username not in self.users_database:print(f"用户名 {username} 未注册，请先注册！") return False

password = input("请输入密码：")

if self.users_database[username] == password:self.username = username self.password = password self.logged_in = True print("登录成功！") return True

# 只在还有尝试机会时显示提示if i < 2:print(f"密码错误，您还有{2 - i}次机会")

student = self.students[sid]student.display_info()

print("\n请选择要修改的项：") print("1: 学号 2: 姓名 3: 性别 4: 年龄 5: 地址 6: 电话 7: 全部 8：退出")

try:choice = input("请输入选择(1-8): ") if choice == '7':new_sid = input("新的学号：") new_sname = input("新的名字：") new_ssex = input("新的性别：") new_sage = int(input("新的年龄：")) new_address = input("新的地址：") new_tel = input("新的电话：")

# 如果学号改变，需要先删除旧的再添加新的if new_sid != sid:del self.students[sid]self.students[new_sid] = Student(new_sid, new_sname, new_ssex,new_sage, new_address, new_tel) else:# 学号没变，直接修改对象属性student.sname = new_sname student.ssex = new_ssex student.sage = new_sage student.address = new_address student.tel = new_tel else:if choice == '1':new_sid = input("新的学号：") if new_sid != sid:self.students[new_sid] = self.students.pop(sid) self.students[new_sid].sid = new_sid elif choice == '2':student.sname = input("新的名字：") elif choice == '3':student.ssex = input("新的性别：") elif choice == '4':student.sage = int(input("新的年龄：")) elif choice == '5':student.address = input("新的地址：") elif choice == '6':student.tel = input("新的电话：") elif choice == '8':return else:print("无效选择！") return

def register(self):# 新用户注册while True:username = input("请输入用户名：") if username in self.users_database:print(f"用户名{username}已存在，请重新输入！") continue

password = input('请输入密码：') self.users_database[username] = password print(f"用户{username}注册成功!")

choice = input('是否继续注册用户？(y/n): ').lower() if choice != 'y':break

def login(self):# 登录验证（检查注册状态+3次尝试机会）

for i in range(3): # 0, 1, 2 username = input("请输入用户名：")

# 先检查用户是否注册if username not in self.users_database:print(f"用户名 {username} 未注册，请先注册！") return False

password = input("请输入密码：")

if self.users_database[username] == password:self.username = username self.password = password self.logged_in = True print("登录成功！") return True

# 只在还有尝试机会时显示提示if i < 2:print(f"密码错误，您还有{2 - i}次机会")

else: # 3次尝试都失败print("您已连续3次输入错误，请重新登录！") return False

def run(self):# 用户系统主界面while True:print("\n================== 用户系统 ==================") choice = input("请选择：1、注册 2、登录 3、退出") if choice == '1':self.register() elif choice == '2':if self.login():# 登录成功后退出用户系统return elif choice == '3':print("退出用户系统！") exit() else:print("无效选择，请重新输入！")

class Student:def __init__(self, sid, sname, ssex, sage, address, tel):self.sid = sid self.sname = sname self.ssex = ssex self.sage = sage self.address = address self.tel = tel

def display_info(self):# 显示学生信息print(f"学号：{self.sid}，姓名：{self.sname}，性别：{self.ssex}，"f"年龄：{self.sage}，地址：{self.address}，电话：{self.tel}")

class StudentManagerSystem:def __init__(self):self.students = {} # 用字典存储学生对象，键为学号

def add_student(self):# 增加学生信息sid = input("请输入学生学号：") if sid in self.students:print("该学号已存在！") return

sname = input("请输入学生姓名：") ssex = input("请输入学生性别：") try:sage = int(input("请输入学生年龄：")) address = input("请输入地址：")# 电话改为字符串，避免以0开头的号码问题tel = input("请输入电话：") self.students[sid] = Student(sid, sname, ssex, sage, address, tel) print("添加成功！") except ValueError:print("年龄必须为数字！")

def delete_student(self):if not self.students:print("当前无任何学生信息！") return# 删除学生信息sid = input("请输入要删除的学生学号：") if sid in self.students:del self.students[sid]print("删除成功！") else:print("未找到该学号的学生！")

def modify_student(self):if not self.students:print("当前无任何学生信息！") return# 修改学生信息sid = input("请输入要修改的学生学号：") if sid not in self.students:print("未找到该学号的学生！") return

student = self.students[sid]student.display_info()

print("\n请选择要修改的项：") print("1: 学号 2: 姓名 3: 性别 4: 年龄 5: 地址 6: 电话 7: 全部 8：退出")

try:choice = input("请输入选择(1-8): ") if choice == '7':new_sid = input("新的学号：") new_sname = input("新的名字：") new_ssex = input("新的性别：") new_sage = int(input("新的年龄：")) new_address = input("新的地址：") new_tel = input("新的电话：")

# 如果学号改变，需要先删除旧的再添加新的if new_sid != sid:del self.students[sid]self.students[new_sid] = Student(new_sid, new_sname, new_ssex,new_sage, new_address, new_tel) else:# 学号没变，直接修改对象属性student.sname = new_sname student.ssex = new_ssex student.sage = new_sage student.address = new_address student.tel = new_tel else:if choice == '1':new_sid = input("新的学号：") if new_sid != sid:self.students[new_sid] = self.students.pop(sid) self.students[new_sid].sid = new_sid elif choice == '2':student.sname = input("新的名字：") elif choice == '3':student.ssex = input("新的性别：") elif choice == '4':student.sage = int(input("新的年龄：")) elif choice == '5':student.address = input("新的地址：") elif choice == '6':student.tel = input("新的电话：") elif choice == '8':return else:print("无效选择！") return

print("修改成功！") except ValueError:print("输入数据有误！")

def find_student_by_sid(self):if not self.students:print("当前无任何学生信息！") return# 查询单个学生信息sid = input("请输入学生学号：") if sid in self.students:self.students[sid].display_info() else:print("未找到该学号的学生！")

def list_all_students(self):if not self.students:print("当前无任何学生信息！") return# 查询所有学生信息print("\n================== 所有学生信息 ==================") for sid, student in self.students.items():student.display_info() print("="*50)

def run(self):"""学生管理系统主界面"""while True:print("\n================== 学生管理系统 ==================") print("1: 添加学生") print("2: 删除学生") print("3: 修改学生") print("4: 单个查询") print("5: 全部查询") print("6: 退出系统")

choice = input("请输入您的选择(1-6): ")

if choice == '1':self.add_student() elif choice == '2':self.delete_student() elif choice == '3':self.modify_student() elif choice == '4':self.find_student_by_sid() elif choice == '5':self.list_all_students() elif choice == '6':print("退出学生管理系统！") break else:print("无效选择，请重新输入！")

if __name__ == '__main__':# 创建用户系统并运行user_system = User() user_system.run()