Python 实现学生成绩管理系统_python用字典创建一个学生成绩管理系统

# 源码
import os
 
filename = 'student.txt'
 
def main():
while True:
        menum()
        choice = int(input('请选择：'))
if choice in [0, 1, 2, 3, 4, 5, 6, 7]:
if choice == 0:
                answer = input('您确定要退出系统吗? y/n')
if answer == 'y' or answer == 'Y':
print('谢谢你的使用!')
break  # 退出系统
                else:
continue
            elif choice == 1:
                insert()  # 录入学生信息
            elif choice == 2:
                search()
elif choice == 3:
                delete()
elif choice == 4:
                modify()
elif choice == 5:
                sort()
elif choice == 6:
                total()
elif choice == 7:
                show()
 
else:
print('输入错误，请重新输入')
 
 
def menum():
print('==================学生信息管理系统===================')
print('---------------------功能菜单-------------------------')
print('\t\t\t\t1、录入学生信息')
print('\t\t\t\t2、查找学生信息')
print('\t\t\t\t3、删除学生信息')
print('\t\t\t\t4、修改学生信息')
print('\t\t\t\t5、排序')
print('\t\t\t\t6、统计学生总人数')
print('\t\t\t\t7、显示所有学生信息')
print('\t\t\t\t0、推出系统')
print('-----------------------------------------------------')
 
 
def insert():
    student_list = []
while True:
        id = input('请输入ID（如10001）：')
if not id:
break
        name = input('请输入姓名：')
if not name:
break
 
        try:
            English = int(input('请输入英语成绩：'))
            Python = int(input('请输入Python成绩：'))
            Java = int(input('请输入Java成绩：'))
except:
print('输入无效，不是整数类型，请重新输入')
continue
        # 将录入的学生信息保存到字典当中
        student = {'id': id, 'name': name, 'English': English, 'Python': Python, 'Java': Java}
# 将学生信息添加到列表中
        student_list.append(student)
        answer = input('是否继续添加？y/n\n')
if answer == 'y' or answer == 'Y':
continue
        else:
break
 
    # 调用save（）函数
    save(student_list)
print('学生信息录入完毕！')
 
 
def save(lst):
try:
        stu_txt = open(filename, 'a+', encoding='utf-8')
except:
        stu_txt = open(filename, 'w', encoding='utf-8')
for item in lst:
        stu_txt.write(str(item) + '\n')
    stu_txt.close()
 
 
def search():
    student_query = []
while True:
        id = ''
        name = ''
        if os.path.exists(filename):
            mode = input('按ID查找请输入1，按姓名查找请输入2：')
if mode == '1':
                id = input('请输入你想要查找的学生ID：')
 
elif mode == '2':
                name = input('请输入你想要查找的学生姓名：')
else:
print('您的输入有误，请重新输入!')
                search()
with open(filename, 'r', encoding='utf-8') as rfile:
                student_old = rfile.readlines()
for item in student_old:
                    d = dict(eval(item))
if id != '':
if d['id'] == id:
                            student_query.append(d)
elif name != '':
if d['name'] == name:
                            student_query.append(d)
# 显示查询结果
            show_student(student_query)
# 清空列表
            student_query.clear()
            answer = input('您要继续查找学生信息吗？y/n')
if answer == 'y' or answer == 'Y':
continue
            else:
break
        else:
print('暂未保存学生信息！')
return
 
 
def show_student(lst):
if len(lst) == 0:
print('没有查询到学生信息，无数据显示！')
return
    # 定义标题显示格式
    format_title = '{:^6}\t{:^12}\t{:^8}\t{:^10}\t{:^10}\t{:^8}'
    print(format_title.format('ID', '姓名', '英语成绩', 'Python成绩', 'Java成绩', '总成绩'))
# 定义内容的显示格式
    format_data = '{:^6}\t{:^12}\t{:^8}\t{:^10}\t{:^10}\t{:^8}'
    for item in lst:
print(format_data.format(item['id'],
                                 item['name'],
                                 item['English'],
                                 item['Python'],
                                 item['Java'],
                                 int(item['English']) + int(item['Python']) + int(item['Java'])))
 
 
def delete():
while True:
        student_id = input('请输入要删除的学生的ID:')
if student_id != '':
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as file:
                    student_old = file.readlines()
else:
                student_old = []
            flag = False  # 标记是否删除
            if student_old:
with open(filename, 'w', encoding='utf-8') as wfile:
d = {}
for item in student_old:
                        d = dict(eval(item))  # 将字符串转成字典
                        if d['id'] != student_id:
                            wfile.write(str(d) + '\n')
else:
                            flag = True
                    if flag:
print(f'ID为{student_id}的学生信息已经被删除')
else:
print(f'没有找到ID为{student_id}的学生信息')
else:
print('无学生信息')
break
            show()  # 删除之后要重新显示所有学生信息
            answer = input('是否继续删除？y/n\n')
if answer == 'y' or answer == 'Y':
continue
            else:
break
 
 
def modify():
    show()
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as rfile:
            student_old = rfile.readlines()
else:
return
    student_id = input('请输入需要修改的学生ID')
if student_old:
with open(filename, 'w', encoding='utf-8') as wfile:
d = {}
for item in student_old:
                d = dict(eval(item))
if d['id'] == student_id:
print('找到学生信息，可以修改他的相关信息！')
while True:
try:
                            d['name'] = input('请输入姓名：')
                            d['English'] = input('请输入英语成绩：')
                            d['Java'] = input('请输入Java成绩：')
                            d['Python'] = input('请输入Python成绩：')
except:
print('您的输入有误！，请重新输入！！')
else:
break
                    wfile.write(str(d) + '\n')
print('修改成功！')
else:
                    wfile.write(str(d) + '\n')
            answer = input('是否继续修改？y/n\n')
if answer == 'y' or answer == 'Y':
                modify()
 
 
def sort():
    show()
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as rfile:
            student_old = rfile.readlines()
        student_new = []
for item in student_old:
            student_new.append(eval(item))
else:
print('暂无学生信息！！')
return
    asc_or_desc = input('请选择（0.升序 1.降序）：')
if asc_or_desc == '0':
        asc_or_desc = False
    elif asc_or_desc == '1':
        asc_or_desc = True
    else:
print('输入有误！请重新输入')
        sort()
    mode = input('请选择排序方式（1.按英语成绩排序   2.按Python成绩排序   3.按Java成绩排序 4.按总成绩排序）：')
if mode == '1':
        student_new.sort(key=lambda x: int(x['English']), reverse=asc_or_desc)  # 排序
    elif mode == '2':
        student_new.sort(key=lambda x: int(x['Python']), reverse=asc_or_desc)
elif mode == '3':
        student_new.sort(key=lambda x: int(x['Java']), reverse=asc_or_desc)
elif mode == '4':
        student_new.sort(key=lambda x: int(x['English'])+int(x['Python'])+int(x['Java']))
else:
print('输入有误，请重新输入！')
        sort()
    show_student(student_new)
 
 
def total():
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as rfile:
            student_old = rfile.readlines()
if student_old:
print('一共有{0}名学生'.format(len(student_old)))
else:
print('还没有录入学生信息！')
 
else:
print('无学生信息！')
 
 
def show():
    student_lst = []
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as rfile:
            student_old = rfile.readlines()
for item in student_old:
                student_lst.append(eval(item))
if student_lst:
                show_student(student_lst)
else:
print('暂无学生信息！')
 
 
if __name__ == '__main__':
    main()
 
"""
    文件打包成.exe
    pip install PyInstaller
    pyinstaller -F 绝对路径
"""