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():
"""
学生管理系统主函数
:return:
"""
while True:
num()
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('谢谢您的使用！！！')
break
else:
continue
elif choice == 1:
insert()
elif choice == 2:
search()
elif choice == 3:
delete()
elif choice == 4:
modify()
elif choice == 5:
sort()
elif choice == 6:
total()
elif choice == 7:
show()
def num():
"""
打印功能列表函数
:return:
"""
print('========================学生成绩管理系统========================')
print('---------------------------功能菜单----------------------------')
print('\t\t\t\t\t\t1.录入学生系统')
print('\t\t\t\t\t\t2.查找学生系统')
print('\t\t\t\t\t\t3.删除学生系统')
print('\t\t\t\t\t\t4.修改学生系统')
print('\t\t\t\t\t\t5.排序')
print('\t\t\t\t\t\t6.统计学生总人数')
print('\t\t\t\t\t\t7.显示所有学生信息')
print('\t\t\t\t\t\t0.退出')
def insert():
"""
1.录入学生信息
:return:
"""
student_list = []
while True:
id = input('请输入ID(如1001):')
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 Exception as e:
print(e)
print('输入有误，不是整数类型，请重新输入！')
continue
# 将录入的系统保存到字典
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
# 保存
save(student_list)
print('学生信息录入完毕！！！')
def save(lst):
"""
保存学生信息
:param lst:
:return:
"""
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():
"""
2.查找学生数据
:return:
"""
student_query = []
while True:
id = ''
name = ''
if os.path.exists(filename):
mode = input('按照ID查找请输入1， 按姓名查找请输入2：')
if mode == '1':
id = input('请输入学生ID')
elif mode == '2':
name = input('请输入学生姓名')
else:
print('输入学生信息不存在，请重新输入！')
search()
with open(filename, 'r', encoding='utf-8') as f:
student = f.readlines()
for item in student:
d = dict(eval(item))
if d['id'] == id:
student_query.append(d)
elif 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('是否要继续查询？y/n\n')
if answer == 'y':
continue
else:
break
else:
print('暂未保存学生信息！')
return
def show_student(lst):
"""
显示学生信息
:param lst:
:return:
"""
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
format_tltle = '{:^6}\t{:^12}\t{:^8}\t{:^10}\t{:^10}\t{:^8}'
print(format_tltle.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{:^10}\t{:^10}\t{:^16}\t{:^12}'
for item in lst:
print(format_data.format(item.get('id'),
item.get('name'),
item.get('english'),
item.get('python'),
item.get('java'),
int(item.get('english')) + int(item.get('python')) + int(item.get('java'))
))
def delete():
"""
3.删除学生信息
:return:
"""
while True:
student_id = input('请输入要删除学生的ID：')
if student_id != '':
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as f:
student_old = f.readlines()
else:
student_old = []
flag = False
if student_old:
with open(filename, 'w', encoding='utf-8') as f:
for item in student_old:
d = dict(eval(item))# 将字符串转为字典
if d['id'] != student_id:
f.write(str(d) + '\n')
else:
flag = True
if flag:
print(f'id为{student_id}的学生信息已被删除')
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()
answer = input('是否继续删除？y/n\n')
if answer == 'y' or answer == 'Y':
continue
else:
break
def modify():
"""
4.修改学生信息
:return:
"""
show()
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as f1:
student_old = f1.readlines()
else:
return
student_id = input('请输入学生的ID：')
with open(filename, 'w', encoding='utf-8') as f:
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['python'] = input('请输入python成绩：')
d['java'] = input('请输入java成绩：')
except Exception as e:
print(e)
print('您输入的有误，请重新输入：')
else:
break
f.write(str(d) + '\n')
print('修改成功')
else:
f.write(str(d) + '\n')
print('没找到学生信息，请重试！')
answer = input('是否继续修改其他学生信息？y/n\n')
if answer == 'y' or answer == 'Y':
modify()
def sort():
"""
排序
:return:
"""
pass
def total():
"""
6.统计所有学生信息个数：6
:return:
"""
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as f:
students= f.readlines()
if students:
print(f'一共有{len(students)}个学生信息！')
else:
print('还没有录入学生信息！')
else:
print('暂未保存数据！！！')
def show():
"""
7.显示所有学生信息
:return:
"""
student_list = []
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as f:
students = f.readlines()
for item in students:
student_list.append(eval(item))
if student_list:
show_student(student_list)
else:
print('暂未保存过数据！')
if __name__ == '__main__':
main()
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