python创建学生成绩管理系统

python学生成绩管理系统创建，供大家参考，具体内容如下

要求编写学生类，班级类，并在电脑运行生成表单，输入一个数字，得到对应的结果。

输出样式

代码如下

学生类

class Student: def __init__(self,sno,name,english,math):  self.sno=sno  self.name=name  self.__english=english  self.__math=math   @property def english(self):  return self.__english   @english.setter def english(self,english):  self.__english=english if 0<=english<=100 else 0   @property def math(self):  return self.__math     @math.setter def math(self,math):  self.__math=math if 0<=math<=100 else 0   def get_average(self):  return (self.english+self.math)/2 def __str__(self):  s=str.format('{0:>4d}{1:　>4s}{2:>8d}{3:>8d}',self.sno,self.name,self.english,self.math)  return s     @staticmethod def get_header():  return '{0:>2s}{1:　>4s}{2:/u3000>4s}{3:　>4s}'.format('学号','姓名','英语','数学')   def __eq__(self,other):  return self.sno==other.sno   def __gt__(self,other):  return self.sno>other.sno

测试

#测试if __name__=='__main__': s1=Student(1,'王大海',100, 65) s2=Student(2,'李三',38,45) s3=Student(3,'李四',88,45) print(s1>s2) students=[s2,s1,s3] students.sort() print(students) print(Student.get_header()) for s in students:  print(s) 

结果

班级类

from student import Studentclass BanJi: def __init__(self,name):  self.name=name  self.students=[]  self.load_data()   def load_data(self):  with open('data.txt','r')as f:   for line in f:    d=line.split()    self.students.append(Student(int(d[0]),d[1],int(d[2]),int(d[3])))     def show_student(self):  print(Student.get_header())  for s in self.students:   print(s)    def add_student(self,student):  if student in self.students:   return '此学生已存在'  else:   self.students.append(student)   return'添加成功'    def __index_student(self,sno):  s=Student(sno,'',0,0)  if s not in self.students:   return None  else:   return self.students.index(s)    def find_student(self,sno):  i = self.__index_student(sno)  if i is None:   return None  else:   return self.students[i] def delete_student(self,sno):  i = self.__index_student(sno)  if i is None:   r = '没有学号为{0: d}'.format(sno)  else:   del self.students[i]   r = '删除成功！'  return r   def update_student(self,sno):  s = self.find_student(sno)  if s is None:   return '没有学号为{0：d}的学生！'.format(sno)  else:   print(s)   print('请输入新的值，直接回车不修改！')   name_str = input('姓名：')   english_str = input('英语：')   math_str = input('数学：')   s.name = name_str if len(name_str)>0 else s.name   s.name = int(english_str) if len(english_str)>0 else s.english   s.name = int(math_str) if len(math_str)>0 else s.math   return '修改成功！'    def save_data(self):  with open('data.txt','w',encoding = 'GBK') as f:   for s in self.students:    r = str.format('{0:d} {1:s} {2:d} {3:d}/n',s.sno,s.name,s.english,s.math)    f.write(r)        def sort_by_english(self,reverse = False):  self.students.sort(key=lambda x: x.english,reverse = reverse)