学生管理系统
【摘要】
一、学生管理系统
studentsystem.py
# coding=utf-8""" 作者:gaojs 功能: 新增功能: 日期:2022/4/3 23:41"""import os.path filename = 'student.txt' def main(): """ 学生管...
一、学生管理系统
studentsystem.py
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# coding=utf-8
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"""
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作者:gaojs
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功能:
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新增功能:
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日期:2022/4/3 23:41
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"""
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import os.path
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filename = 'student.txt'
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def main():
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"""
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学生管理系统主函数
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:return:
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"""
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while True:
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num()
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choice = int(input('请选择'))
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if choice in [0, 1, 2, 3, 4, 5, 6, 7]:
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if choice == 0:
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answer = input('您确定要退出系统吗?y/n')
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if answer == 'y' or answer == 'Y':
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print('谢谢您的使用!!!')
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break
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else:
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continue
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elif choice == 1:
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insert()
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elif choice == 2:
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search()
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elif choice == 3:
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delete()
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elif choice == 4:
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modify()
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elif choice == 5:
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sort()
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elif choice == 6:
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total()
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elif choice == 7:
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show()
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def num():
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"""
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打印功能列表函数
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:return:
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"""
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print('========================学生成绩管理系统========================')
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print('---------------------------功能菜单----------------------------')
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print('\t\t\t\t\t\t1.录入学生系统')
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print('\t\t\t\t\t\t2.查找学生系统')
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print('\t\t\t\t\t\t3.删除学生系统')
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print('\t\t\t\t\t\t4.修改学生系统')
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print('\t\t\t\t\t\t5.排序')
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print('\t\t\t\t\t\t6.统计学生总人数')
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print('\t\t\t\t\t\t7.显示所有学生信息')
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print('\t\t\t\t\t\t0.退出')
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def insert():
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"""
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1.录入学生信息
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:return:
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"""
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student_list = []
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while True:
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id = input('请输入ID(如1001):')
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if not id:
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break
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name = input('请输入姓名:')
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if not name:
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break
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try:
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english = int(input('请输入英语成绩:'))
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python = int(input('请输入python成绩:'))
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java = int(input('请输入java成绩:'))
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except Exception as e:
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print(e)
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print('输入有误,不是整数类型,请重新输入!')
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continue
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# 将录入的系统保存到字典
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student = {'id': id, 'name': name, 'english': english, 'python': python, 'java': java}
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# 将学生信息添加到列表中
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student_list.append(student)
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answer = input('是否继续添加y/n\n')
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if answer == 'y' or answer == 'Y':
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continue
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else:
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break
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# 保存
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save(student_list)
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print('学生信息录入完毕!!!')
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def save(lst):
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"""
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保存学生信息
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:param lst:
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:return:
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"""
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try:
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stu_txt = open(filename, 'a', encoding='utf-8')
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except:
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stu_txt = open(filename, 'w', encoding='utf-8')
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for item in lst:
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stu_txt.write(str(item) + '\n')
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stu_txt.close()
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def search():
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"""
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2.查找学生数据
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:return:
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"""
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student_query = []
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while True:
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id = ''
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name = ''
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if os.path.exists(filename):
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mode = input('按照ID查找请输入1, 按姓名查找请输入2:')
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if mode == '1':
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id = input('请输入学生ID')
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elif mode == '2':
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name = input('请输入学生姓名')
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else:
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print('输入学生信息不存在,请重新输入!')
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search()
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with open(filename, 'r', encoding='utf-8') as f:
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student = f.readlines()
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for item in student:
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d = dict(eval(item))
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if d['id'] == id:
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student_query.append(d)
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elif d['name'] == name:
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student_query.append(d)
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# 显示查询结果
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show_student(student_query)
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# 清空列表
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student_query.clear()
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answer = input('是否要继续查询?y/n\n')
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if answer == 'y':
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continue
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else:
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break
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else:
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print('暂未保存学生信息!')
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return
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def show_student(lst):
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"""
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显示学生信息
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:param lst:
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:return:
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"""
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if len(lst) == 0:
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print('没有查询到学生信息,无数据显示!!!')
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return
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# 定义标题显示
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format_tltle = '{:^6}\t{:^12}\t{:^8}\t{:^10}\t{:^10}\t{:^8}'
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print(format_tltle.format('ID', '姓名', '英语成绩', 'python成绩', 'java成绩', '总成绩'))
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# 定义内容的显示格式
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format_data = '{:^6}\t{:^12}\t{:^10}\t{:^10}\t{:^16}\t{:^12}'
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for item in lst:
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print(format_data.format(item.get('id'),
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item.get('name'),
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item.get('english'),
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item.get('python'),
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item.get('java'),
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int(item.get('english')) + int(item.get('python')) + int(item.get('java'))
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))
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def delete():
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"""
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3.删除学生信息
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:return:
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"""
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while True:
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student_id = input('请输入要删除学生的ID:')
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if student_id != '':
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if os.path.exists(filename):
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with open(filename, 'r', encoding='utf-8') as f:
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student_old = f.readlines()
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else:
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student_old = []
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flag = False
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if student_old:
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with open(filename, 'w', encoding='utf-8') as f:
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for item in student_old:
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d = dict(eval(item))# 将字符串转为字典
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if d['id'] != student_id:
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f.write(str(d) + '\n')
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else:
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flag = True
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if flag:
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print(f'id为{student_id}的学生信息已被删除')
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else:
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print(f'没有找到ID为{student_id}的学生信息')
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else:
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print('无学生信息')
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break
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show()
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answer = input('是否继续删除?y/n\n')
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if answer == 'y' or answer == 'Y':
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continue
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else:
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break
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def modify():
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"""
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4.修改学生信息
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:return:
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"""
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show()
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if os.path.exists(filename):
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with open(filename, 'r', encoding='utf-8') as f1:
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student_old = f1.readlines()
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else:
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return
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student_id = input('请输入学生的ID:')
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with open(filename, 'w', encoding='utf-8') as f:
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for item in student_old:
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d = dict(eval(item))
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if d['id'] == student_id:
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print('找到学生信息,可以修改相关信息!')
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while True:
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try:
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d['name'] = input('请输入姓名:')
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d['english'] = input('请输入英语成绩:')
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d['python'] = input('请输入python成绩:')
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d['java'] = input('请输入java成绩:')
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except Exception as e:
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print(e)
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print('您输入的有误,请重新输入:')
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else:
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break
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f.write(str(d) + '\n')
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print('修改成功')
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else:
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f.write(str(d) + '\n')
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print('没找到学生信息,请重试!')
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answer = input('是否继续修改其他学生信息?y/n\n')
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if answer == 'y' or answer == 'Y':
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modify()
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def sort():
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"""
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排序
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:return:
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"""
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pass
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def total():
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"""
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6.统计所有学生信息个数:6
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:return:
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"""
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if os.path.exists(filename):
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with open(filename, 'r', encoding='utf-8') as f:
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students= f.readlines()
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if students:
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print(f'一共有{len(students)}个学生信息!')
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else:
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print('还没有录入学生信息!')
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else:
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print('暂未保存数据!!!')
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def show():
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"""
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7.显示所有学生信息
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:return:
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"""
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student_list = []
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if os.path.exists(filename):
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with open(filename, 'r', encoding='utf-8') as f:
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students = f.readlines()
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for item in students:
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student_list.append(eval(item))
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if student_list:
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show_student(student_list)
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else:
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print('暂未保存过数据!')
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if __name__ == '__main__':
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main()
文章来源: blog.csdn.net,作者:懿曲折扇情,版权归原作者所有,如需转载,请联系作者。
原文链接:blog.csdn.net/qq_41332844/article/details/126837400
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