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 Student

class 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)

学生管理系统

import os
from student import Student
from banji import BanJi

menu = """

*********************

学生成绩管理系统
1.浏览学生成绩
2.按学号查找学生
3.按英语成绩排序
4.添加学生
5.删除学生
6.修改学生信息
9.保存
0.退出

*********************

"""
tip = '输入（0-9）选择操作：'

choice = ''

b = BanJi('1802')

os.system('cls')
print(menu)

while True:
choice = input(tip)
os.system('cls')
print(menu)
if choice == '0':
 print('数据以保存！')
 break
elif choice == '1':
 b.show_student()
elif choice == '2':
 sno = int(input('请输入您需要查询的学生的学号：'))
 s = b.find_student(sno)
 if s is None:
  print('无此学号的学生！')
 else:
  print(s)
elif choice == '3':
 b.sort_by_english()
 b.show_student()
elif choice == '4':
 print('请输入学生信息：')
 sno = int(input('学号：'))
 name = input('姓名：')
 english = int(input('英语：'))
 math = int(input('数学：'))
 student = Student(sno,name,english,math)
 r = b.add_student(student)
 print(r)
elif choice == '5':
 sno = int(input('请输入要删除的学生的学号：'))
 r = b.delete_student(sno)
 print(r)

elif choice == '6':
 sno = int(input('请输入要修改的学生的学号：'))
 r = b.update_student(sno)
 print(r)

elif choice == '9':
 b.save_data()
 print('保存成功！')
else:
 print('输入错误！')

用spyder或者cmd运行都可以。

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来源：https://blog.csdn.net/qq_44174481/article/details/92071468