一、运行结果图
二、练习demo目录结构
# ------------功能菜单------------
# 1、录入学生信息
# 2、查找学生信息
# 3、删除学生信息
# 4、修改学生信息
# 5、排序
# 6、统计学生总人数
# 7、显示所有学生信息
# 0、退出
# --------------------------------
import os
# student.txt文件创建在代码同文件下
fileName = 'student.txt'
def main():
while True:
nav()
try:
choose = int(input('请选择：'))
if choose in [0, 1, 2, 3, 4, 5, 6, 7]:
if choose == 0:
answer = input('你确定要退出系统吗？请输入y/n或 Y/N')
if answer =='y' or answer =='Y':
print('谢谢你的使用，退出系统成功') # 退出系统成功
break
else:
continue
elif choose == 1:
insert()
elif choose == 2:
search()
elif choose == 3:
delete()
elif choose == 4:
modify()
elif choose == 5:
sort()
elif choose == 6:
total()
elif choose == 7:
show()
else:
print('请输入 0, 1, 2, 3, 4, 5, 6, 7')
except ValueError as e:
print('输入有误！', e)
def nav():
print('==========学生管理系统==========')
print('------------功能菜单------------')
print('\t 1、录入学生信息')
print('\t 2、查找学生信息')
print('\t 3、删除学生信息')
print('\t 4、修改学生信息')
print('\t 5、排序')
print('\t 6、统计学生总人数')
print('\t 7、显示所有学生信息')
print('\t 0、退出')
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：'))
math = int(input('请输入数学成绩：'))
java = int(input('请输入java成绩：'))
javascript = int(input('请输入javascript成绩：'))
except:
print('输入无效。请输入正确的整数类型，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': english, 'python': python, 'math': math, 'java': java, 'javascript': javascript}
# 将学生添加到列表当中
student_list.append(student)
answer = input('是否确认继续添加？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:
a = stu_txt.write(str(item)+'\n')
print(a)
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：')
elif mode == '2':
name = input('请输入学生姓名：')
else:
print('你输入有误，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()
anwser = input('是否要继续查询？y/n')
if anwser == 'y' or anwser == 'Y':
continue
else:
break
else:
print('未查询到学生信息！')
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{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}'
print(format_title.format('ID', '姓名', '英语成绩', 'Python成绩', '数学成绩', 'java成绩', 'javascript成绩', '总成绩'))
# 定义显示内
format_data = '{:^6}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}\t{:^12}'
for item in lst:
print(
format_data.format(
item.get('id'),
item.get('name'),
item.get('english'),
item.get('python'),
item.get('math'),
item.get('java'),
item.get('javascript'),
int(item.get('english')) + int(item.get('python')) + int(item.get('math')) + int(item.get('java')) + int(item.get('javascript'))
)
)
def delete():
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 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)) # 将字符转换为字典
if d['id'] != student_id:
wfile.write(str(d) + '\n')
else:
flag = True
if flag:
print('id为',student_id,'的学生信息已经被删除')
else:
print('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('是否确认继续添加？y/n\n')
if answer == 'y' or answer =='Y':
continue
else:
break
else:
print('请输入数据')
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('请输入要修改学员的ID：')
with open(fileName, 'w', encoding='utf-8') as wfile:
for item in student_old:
d = dict(eval(item))
try:
if d['id'] == student_id:
print('找到学生信息，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['math'] = input('请输入数学成绩：')
d['java'] = input('请输入java成绩：')
d['javascript'] = input('请输入javascript成绩：')
except:
print('输入的数据有误，请重新输入！')
else:
break
wfile.write(str(d)+'\n')
print('修改成功！')
else:
wfile.write(str(d)+'\n')
print('未查询到你输入的ID值！')
except:
print('输入的数据有误，请重新输入！')
answer = input('是否继续修改其他学生信息？y/n或者Y/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_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('你的输入有误，请重新输入')
sort()
mode = input(
'请选择排序方式（1.按English排序 2.按python排序 3.按math排序 4.按java排序 5.按javaScript排序 6.按总成绩排序）'
)
if mode == '1':
student_new.sort(key=lambda x: int(x['english']), reverse=asc_or_desc_bool)
elif mode == '2':
student_new.sort(key=lambda x: int(x['python']), reverse=asc_or_desc_bool)
elif mode == '3':
student_new.sort(key=lambda x: int(x['math']), reverse=asc_or_desc_bool)
elif mode == '4':
student_new.sort(key=lambda x: int(x['java']), reverse=asc_or_desc_bool)
elif mode == '5':
student_new.sort(key=lambda x: int(x['javascript']), reverse=asc_or_desc_bool)
elif mode == '6':
student_new.sort(key=lambda x: int(x['english']) + int(x['python']) + int(x['math']) + int(x['java']) + int(x['javascript']), reverse=asc_or_desc_bool)
else:
print('输入的排序方式有误！')
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('共有',len(students),'名学生')
else:
print('还没有录入学生信息')
else:
print('暂未保存数据信息......')
def show():
student_list = []
if os.path.exists(fileName):
with open(fileName, 'r', encoding='utf-8') as rfile:
students = rfile.readlines()
for item in students:
student_list.append(eval(item))
if student_list:
show_student(student_list)
else:
print('暂未保存数据......')
if __name__ == '__main__':
main()
# 打包 pyinstaller -F E:\workspace\Python\0基础学python练习\sty\students\stusystem.py