#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2022-05-12
# @Author :
# @Platform:
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('谢谢您的使用！！！')
break # 退出系统
else:
continue
elif choice ==1:
insert() # 录入学生信息
elif choice ==2:
search() # 查找学生信息
elif choice ==3:
delete() # 删除学生信息
elif choice ==4:
modify() # 修改学生信息
elif choice ==5:
sort() # 排序
elif choice ==6:
total() # 统计学生总人数
elif choice ==7:
show() # 显示所有学生信息
def menum():
print("--------------------------学生信息管理系统-----------------------------")
print("--------------------------功能菜单-----------------------------")
print("\t\t\t\t\t\t\t1.录入学生信息")
print("\t\t\t\t\t\t\t2.查找学生信息")
print("\t\t\t\t\t\t\t3.删除学生信息")
print("\t\t\t\t\t\t\t4.修改学生信息")
print("\t\t\t\t\t\t\t5.排序")
print("\t\t\t\t\t\t\t6.统计学生总人数")
print("\t\t\t\t\t\t\t7.显示所有学生信息")
print("\t\t\t\t\t\t\t0.退出")
print('------------------------------------------------------------')
def insert():
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:
englist = 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中
student = {'id':id,'name':name,'english':englist,'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':
continue
else:
break
# 调用save()函数
save(student_list)
print('学生信息录入完毕')
# 学生信息录入函数
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('请输入学生ID:\n')
elif mode == '2':
name = input('请输入学生姓名:\n')
else:
print("您的输入有误, 请重新输入")
search()
with open(filename,'r',encoding='utf-8') as rfile:
student = rfile.readlines()
for item in student:
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('是否继续查询y/n\n')
if answer == 'y':
continue
else:
break
else:
print('暂未保存学生信息')
# 显示查询结果函数
def show_student(lst):
if len(lst) ==0:
print("没有查询到相关学生信息")
return
# 定义标题显示格式
format_title = '{:^6}\t{:^10}\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{:^11}\t{:^12}\t{:^10}\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():
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:
print("item",item)
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() # 删除之后继续显示所有学生信息
answer = input('是否继续删除？y/n\n')
if 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('请输入要修改的学生信息ID:')
with open(filename,'w',encoding='utf-8') as wfile:
for item in student_old:
d = dict(eval(item))
if d['id']==student_id: # 是否要修改学生信息
print('找到这名学生，可以修改他的相关信息了！')
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:
print('您的输入有误，请重新输入')
else:
break # 退出循环
wfile.write(str(d)+'\n')
print('学生信息修改成功')
else:
wfile.write(str(d) + '\n')
# print('学生信息修改成功')
answer = input('是否继续修改其他学生信息？y/n\n')
if answer == 'y':
modify()
def sort():
show()
if os.path.exists(filename): # 判断文件是否存在
with open(filename, 'r', encoding='utf-8') as rfile:
student_list = rfile.readlines()
student_new =[]
for item in student_list:
d = dict(eval(item))
student_new.append(d)
else:
return
asc_or_desc = input('请选择 0.升序 1.降序')
if asc_or_desc == '0':
asc_or_desc_bool = False
elif asc_or_desc == '1':
asc_or_desc_bool = True
else:
print('您的输入有误，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语言成绩排序,0.按总成绩排序:")
if mode =='1':
student_new.sort(key=lambda x: int(x['english']),reverse=asc_or_desc_bool) #按英语成绩排序
elif mode == '2':
student_new.sort(key=lambda x: int(x['python']), reverse=asc_or_desc_bool) # 按python成绩排序
elif mode == '3':
student_new.sort(key=lambda x: int(x['java']), reverse=asc_or_desc_bool) # 按java成绩排序
elif mode == '0':
student_new.sort(key=lambda x: int(x['english'])+int(x['python'])+int(x['java']), reverse=asc_or_desc_bool) # 按总分成绩排序
else:
print('输入有误，请您重新输入！')
sort()
show_student(student_new) #显示排序结果
def total():
show()
if os.path.exists(filename): # 判断文件是否存在
with open(filename,'r',encoding='utf-8') as rfile:
students = rfile.readlines()
if students:
print('一共有{}名学生'.format(len(students)))
else:
print('还没有录入学生信息')
else:
print('暂未保存学生数据信息......')
def show():
student_lst=[]
if os.path.exists(filename): # 判断文件是否存在
with open(filename,'r',encoding='utf-8') as rfile:
students = rfile.readlines()
for item in students:
student_lst.append(eval(item))
if student_lst: # 如果有学生信息添加列表展示
show_student(student_lst)
else:
print('还没有录入学生信息')
else:
print('暂未保存学生数据信息......')
if __name__ == '__main__':
main()
