基于Python的成绩管理系统

基于Python的成绩管理系统是一个用于管理学生信息和成绩的系统。该系统可以实现以下功能：
1. 添加学生信息和成绩
2. 修改学生信息和成绩
3. 删除学生信息和成绩
4. 查询学生信息和成绩
5. 统计学生的平均成绩和绩点

系统的实现可以借助Python的面向对象编程思想，将学生和成绩作为对象，通过定义类和方法来实现各个功能。

以下是一个示例代码，展示了如何通过Python实现一个简单的基于命令行界面的成绩管理系统：

class Student:
    def __init__(self, student_id, name, c_score, python_score, java_score):
        self.student_id = student_id
        self.name = name
        self.c_score = c_score
        self.python_score = python_score
        self.java_score = java_score

    def calculate_gpa(self):
        total_score = self.c_score + self.python_score + self.java_score
        gpa = (total_score - 180) / 30
        return round(gpa, 2)


class GradeManagementSystem:
    def __init__(self):
        self.students = []

    def add_student(self, student):
        self.students.append(student)

    def remove_student(self, student_id):
        for student in self.students:
            if student.student_id == student_id:
                self.students.remove(student)
                break

    def update_student(self, student_id, updated_student):
        for i, student in enumerate(self.students):
            if student.student_id == student_id:
                self.students[i] = updated_student
                break

    def get_student(self, student_id):
        for student in self.students:
            if student.student_id == student_id:
                return student

    def get_all_students(self):
        return self.students

    def print_student_info(self, student):
        print("{:^6}\t{:^12}\t{:^8}\t{:^10}\t{:^10}\t{:^8}".format(
            'ID', '姓名', 'C语言成绩', 'Python成绩', 'Java成绩', '绩点'))
        print("{:^6}\t{:^12}\t{:^8}\t{:^8}\t{:^8}\t{:^8}".format(
            student.student_id, student.name, student.c_score, student.python_score, student.java_score,
            student.calculate_gpa()))

    def print_all_students_info(self):
        if len(self.students) == 0:
            print('列表中无学生信息')
        else:
            for student in self.students:
                self.print_student_info(student)


# 创建一个成绩管理系统的实例
system = GradeManagementSystem()

# 添加学生信息
student1 = Student('001', '张三', 80, 90, 85)
system.add_student(student1)
student2 = Student('002', '李四', 75, 85, 90)
system.add_student(student2)

# 打印所有学生信息
system.print_all_students_info()