代码供参考：链接：https://pan.baidu.com/s/1kO0XgXM98rorw-i1dJFL9Q 密码：g4go
运行逻辑如下：
运行create_manager_user创建一个管理员账号
运行main程序，通过校验账号名密码来确定用户的权限，账号密码权限等信息均存储在user_info这张表中；
运行main程序，通过校验账号名密码来确定用户的权限，账号密码权限等信息均存储在user_info这张表中；
管理员验证通过后，进入managersystem()，可以进行如下操作：
menu_manager = ['Create School','Create Class','Create Teacher','Create Student','Create Course']
同理老师/学生可以有如下操作：
menu_teacher = ['Show Your School infomation','Show Your Classes infomation'] menu_stu = ['Select School','Select Class','Pay Tuition ']
使用eval()来实现对应的函数功能，但是不能传入参数，导致后续用户重复输入用户名，待解决！
简单记录几个函数
1. createSchool():
让用户以input的方式输入对象的属性信息，新建一个对象，并保存所有属性信息，在保存的时候曾遇到障碍：
因为设置了school={}，所以每次写入时都会清空原有字典信息，重新写入，而不是增加，解决办法如下：
先判断下该文件是否为空，如果为空就正常写入school={}，如果不为空就读出文件信息，更新信息并重新写入，不知道是否有更好的办法！
def save_info(self):
school_info_exist = file_open_ifnone('school_info')
if school_info_exist:
with open('school_info', 'rb') as f_schoolinfo_r:
while True:
try:
school_info = pickle.load(f_schoolinfo_r)
except:
school_info[self.name] = {}
school_info[self.name]['address'] = self.address
school_info[self.name]['headmaster'] = self.headmaster
school_info[self.name]['tel'] = self.tel
school_info[self.name]['classeslist'] = self.classeslist
school_info[self.name]['teacherlist'] = self.teacherlist
school_info[self.name]['studentlist'] = self.studentlist
print(school_info)
# 以二进制的方式写入文件中
with open("school_info", 'ab') as f_schoolinfo:
pickle.dump(school_info, f_schoolinfo)
break
else:
school[self.name] = {}
school[self.name]['address'] = self.address
school[self.name]['headmaster'] = self.headmaster
school[self.name]['tel'] = self.tel
school[self.name]['classeslist'] = self.classeslist
school[self.name]['teacherlist'] = self.teacherlist
school[self.name]['studentlist'] = self.studentlist
print(school)
# 以二进制的方式写入文件中
with open("school_info", 'ab') as f_schoolinfo:
pickle.dump(school, f_schoolinfo)
2. chooseSchool():
学生视图下的选择学校函数，逻辑为先展示所有学校的信息，然后让学生输入想选择的学校，如果输入的学校名称在列表中，再输入学生姓名，并查询此学校目前的学生信息，如果该学生没在此学校注册过，则更新学校-studentlist的信息，即学生完成注册