133 学生情報管理システム
ジョブコード:
import json
import os
filename = 'student.txt'
def main():
while True:
menu()
choice = int(input('请选择'))
if choice in [0, 1, 2, 3, 4, 5, 6, 7]:
if choice == 0:
answer = input('确认退出？ y/n ')
if answer == 'y' or answer == 'Y':
print('谢谢使用！')
break
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
elif choice == 4:
modify() # 修改
elif choice == 5:
sort() # 排序
elif choice == 6:
total() # 统计
elif choice == 7:
show() # 显示
def menu():
print('{:=^30}'.format('学生信息管理系统'))
print('{:-^32}'.format('功能菜单'))
print(' 1.录入学生信息'.ljust(15))
print(' 2.查找学生信息'.ljust(15))
print(' 3.删除学生信息'.ljust(15))
print(' 4.修改学生信息'.ljust(15))
print(' 5.排序'.ljust(15))
print(' 6.统计学生总人数'.ljust(15))
print(' 7.显示所有学生信息'.ljust(15))
print(' 0.退出系统'.ljust(15))
print('{:-^35}'.format(''))
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 insert():
student_list = []
while True:
id = input('请输入学生ID（如1001）： ')
if not id:
break
name = input('请输入学生姓名： ')
if not name:
break
try:
english = input('请输入英语成绩： ')
python = input('请输入Python成绩： ')
java = 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
# 将输入的成绩保存
student = {'id': id, 'name': name, 'English': english, 'Python': python, 'Java': java}
# 信息添加
student_list.append(student)
answer = input('是否继续添加？ y/n \n')
if answer == 'y' or answer == 'Y':
continue
else:
break
save(student_list)
print('学生信息录入完毕！')
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{:^8}\t{:^8}\t' # 冒号后面表示填充内容
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}\t'
# 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') + item.get('Python') + item.get('Java'))
# ))
format_data = '{:^6}\t{:^12}\t{:^8}\t{:^10}\t{:^10}\t{:^8}\t'
for item in lst:
print(format_data.format(
item.get('id'),
item.get('name'),
'{:^8}'.format(item.get('English')),
'{:^10}'.format(item.get('Python')),
'{:^10}'.format(item.get('Java')),
'{:^8}'.format(int(item.get('English')) + int(item.get('Python')) + int(item.get('Java')))
))
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')
elif mode == '2':
name = input('请输入学生姓名')
else:
print('输入错误，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' or answer == 'Y':
continue
else:
break
else:
print('暂未保存目标学生信息')
return
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 # 表示已经删除
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('学生信息列表为空，无学生信息')
break
show() # 删除完成后重新显示所有学生的信息
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('请输入要修改的学员ID：')
flag = False
with open(filename, 'w', encoding='utf-8') as wfile:
for item in student_old:
d = dict(eval(item))
if d['id'] == student_id:
flag = True # 查找成功的标志位
print('找到学生信息，可以修改其内容')
while True:
try:
d['name'] = input('请输入姓名')
d['English'] = int(input('请输入英语成绩'))
d['Python'] = int(input('请输入Python成绩'))
d['Java'] = int(input('请输入Java成绩'))
except:
print('输入有误，重新输入')
else:
break
wfile.write(str(d) + '\n')
print('修改成功')
else:
wfile.write(str(d) + '\n')
if not flag:
print(f'没有找到ID为{student_id}的学生信息')
answer = input('是否继续修改？ y/n \n')
if answer == 'y' or answer == 'Y':
modify()
def sort():
show()
student_new = []
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as rfile:
students_lst = rfile.readlines()
for item in students_lst:
d = dict(eval(item))
student_new.append(d)
else:
print('暂未保存数据信息……')
return
asc_or_desc = input('输入排序要求，0为升序，1为降序')
if asc_or_desc == '0':
asc_or_desc_flag = False
elif asc_or_desc == '1':
asc_or_desc_flag = True
else:
print('输入有误，重新输入')
sort()
mode = int(input('请选择排序方式（1.按英语 2.按Python 3.按Java 4.按总成绩'))
if mode == 1:
student_new.sort(key=lambda x: int(x['English']), reverse=asc_or_desc_flag)
elif mode == 2:
student_new.sort(key=lambda x: int(x['Python']), reverse=asc_or_desc_flag)
elif mode == 3:
student_new.sort(key=lambda x: int(x['Java']), reverse=asc_or_desc_flag)
elif mode == 4:
student_new.sort(key=lambda x: int(int(x['English']) + int(x['Python']) + int(x['Java'])),
reverse=asc_or_desc_flag)
else:
print('输入有误，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:
students = rfile.readlines()
if students:
print(f'一共有{len(students)}名学生')
else:
print('暂未录入学生信息')
else:
print('暂未保存数据信息……')
def show():
student_lst = []
if os.path.exists(filename):
with open(filename, 'r', encoding='utf-8') as rfile:
students = rfile.readlines()
for item in students:
student_lst.append(eval(item))
if student_lst:
show_student(student_lst)
else:
print('暂未保存数据信息……')
if __name__ == '__main__':
main()