###模块
import os
import time
# 自定义文件名
filename = 'student.txt'
#####菜单操作*
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('你确定要退出系统？y/n')
if answer == 'y' or answer == 'Y':
print('谢谢你的使用')
break
else:
continue
elif choice == 1:
insert()
elif choice == 2:
search()
elif choice == 3:
delete()
elif choice == 4:
modify()
elif choice == 6:
total()
elif choice== 7:
show()
elif choice== 5:
sort()
########显示菜单*
def menu(): ####显示菜单
print('============学生管理==============')
print('--------------功能菜单------------')
print('\t\t\t\t\t\t1.录入学生信息')
print('\t\t\t\t\t\t2.查找学生信息')
print('\t\t\t\t\t\t3.删除学生信息')
print('\t\t\t\t\t\t4.修改学生信息')
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.退出系统')
print('---------------------------') ################显示菜单
###录入学生信息*
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，不是证书类型，请重新输入')
continue
####将录入的学生信息保存到字典
student = {'id': id, 'name': name, 'english': englist, 'python': python, 'java': java}
# 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
##调用save()函数
save(student_list)
print('学生信息录入完毕！')
#####1录入保存操作*
def save(lst):
try:
stu_txt = open(filename, 'a', encoding='utf-8')
except:
stu_txt = open(filename, 'a+', encoding='utf-8')
for item in lst:
stu_txt.write(str(item) + '\n')
stu_txt.close()
####2查询学生信息 *
def search():
student_quert = []
while True:
id = ''
name = ''
if os.path.exists(filename):
mode = input('按IP查询输入1,按姓名查找输入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('您输入有误，请重新输入')
search() ####重新调用自己函数
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_quert.append(d)
elif name != '':
if d['name'] == name:
student_quert.append(d)
###显示查询结果
show_student(student_quert)
# 清空列表
student_quert.clear()
anser = input('是否继续查询?y/n \n')
if anser == 'y':
continue #####跳出本次循环，执行下一次
if anser == 'n':
break
else:
print('暂未保存学生信息')
return
####输出2 查询学生结果*
def show_student(lst):
if len(lst) == 0:
print('没有查询到学生信息，无数据')
return
#####定义标题显示格式
format_title = '{:^16}{:^12}{:^18}{:^10}{:^18}{:^18}'
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{:^8}\t{:^18}'
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')),
))
###3删除学生信息*
def delete():
while True:
student_id = input('请输入要删除的学生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: # d['id'] 为d 列表中id为XX
wfile.write(str(d) + '\n')
else:
flag = True
if flag:
print(f'id为{student_id}的学生已删除')
else:
print(f'没有找到ID为{student_id}的学生')
else:
print('无学生信息,将在两秒钟后返回主菜单')
time.sleep(2)
break
show() ####删除后重新显示所有学生信息
answer = input('是否继续删除？/n\n')
if answer == 'y':
continue
else:
break
###4修改学生信息*
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ID：')
# if student_id != '': ####如果无学生信息
with open(filename, 'w', encoding='utf-8') as wfile:
for item in student_old:
d = dict(eval(item))
if d['id'] == student_id:
print(f'找到学生{student_id}信息可以修改)')
while True:
try:
d['name'] = input('请输入姓名')
d['english'] = input('enlish')
d['python'] = input('python')
d['java'] = input('java')
except:
print('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('是否继续秀嘎其他学生信息？ y/n \n')
if answer == 'y':
modify()
# else:
# print('无学生信息,将在两秒钟后返回主菜单')
# time.sleep(2)
####5排序
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')
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 0.按总成绩)')
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['java']),reverse=asc_or_desc_bool)
elif mode=='0':
student_new.sort(key=lambda x:int(x['english'])+int(x['python'])+int(x['java']),reverse=asc_or_desc_bool)
else:
print('输入有无，重新输入')
sort()
show_student(student_new)
###6查询学生总人数
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{len(students)}名学生,2s后返回主菜单') ###判断列表总长度
time.sleep(2)
else:
print('还没有录入学生')
else:
print('无保存数据')
####7输出学生列表
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) #####show_student是输出函数
time.sleep(5)
else:
print('未保存学生信息')
#######
if __name__ == '__main__':
main()
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