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)

学生管理系统

import osfrom student import Studentfrom banji import BanJimenu = """********************* 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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