class Student(object):
student_num = 0
def add_student(self, student_info):
with open('student.txt', 'a') as file:
file.write(student_info + 'n')
return '添加成功'
def get_student_info(self, student_num):
with open('student.txt', 'r') as file:
lines = file.readlines()
for line in lines:
if student_num == line[0:5]:
result = line
break
else:
result = '学号不存在'
return result
def get_all_students_info(self):
with open('student.txt', 'r') as file:
result = file.read()
return result
def del_student(self, student_num):
if not self.is_student_exists(student_num):
return '该账号不存在'
with open('student.txt', 'r') as file:
lines = file.readlines()
with open('student.txt', 'w') as file:
for line in lines:
if student_num == line[0:5]:
continue
file.write(line)
return '删除成功'
def edit_student(self, student_num):
if not self.is_student_exists(student_num):
return '该账号不存在'
with open('student.txt', 'r') as file:
lines = file.readlines()
with open('student.txt', 'w') as file:
for line in lines:
if student_num == line[0:5]:
name = input('请输入要录入的学生姓名:')
gender = input('请输入学生的性别:')
phone = input('请输入学生的手机号:')
student_info = ','.join([student_num, name, gender, phone])
file.write(student_info + 'n')
else:
file.write(line)
return '修改成功'
def is_student_exists(self, student_num):
with open('student.txt', 'r') as file:
lines = file.readlines()
for line in lines:
if line[0:5] == student_num:
return True
else:
return False
@property
def creat_student_number(self):
if self.student_num == 0:
try:
with open('student.txt', 'r') as file:
lines = file.readlines()
last_line = lines[-1]
if last_line:
self.student_num = int(last_line.split(',')[0]) + 1
else:
self.student_num = 10001
except:
self.student_num = 10001
return str(self.student_num)
else:
self.student_num += 1
return str(self.student_num)
def menu_show():
print('''
--------------------------------------------
- 学生管理系统 V1.0
- 1.添加学生
- 2.查询学生
- 3.显示所有学生
- 4.删除学生
- 5.修改学生
- 0.退出系统
--------------------------------------------
''')
def main():
student = Student()
menu_show()
while True:
try:
number = int(input('请按照提示输入您要执行操作的序号:'))
except:
print('请输入正确的序号')
else:
if number == 0:
print('退出成功')
break
elif number == 1:
student_num = student.creat_student_number
name = input('请输入要录入的学生姓名:')
gender = input('请输入学生的性别:')
phone = input('请输入学生的手机号:')
student_info = ','.join([student_num, name, gender, phone])
result = student.add_student(student_info)
print(result)
elif number == 2:
student_num = input('请输入要查询学生的学号:')
result = student.get_student_info(student_num)
print(result)
elif number == 3:
result = student.get_all_students_info()
print(result)
elif number == 4:
student_num = input('请输入要删除学生的学号:')
confirm = input('确认删除请输入Y/YES:')
if confirm == 'Y' or confirm == 'YES':
result = student.del_student(student_num)
print(result)
else:
print('取消删除操作')
elif number == 5:
student_num = input('请输入要修改学生的学号:')
result = student.edit_student(student_num)
print(result)
else:
print('请输入正确的序号')
continue
if __name__ == '__main__':
main()
