写一个python成绩计算的代码

当然可以，这是一个简单的Python代码示例，用于计算学生成绩并支持加权平均：

class Student:
    def __init__(self, name):
        self.name = name
        self.grades = {}

    def add_grade(self, subject, grade, weight=1):
        """
        添加单门课程的成绩及权重
        """
        if subject not in self.grades:
            self.grades[subject] = {'grade': grade, 'weight': weight}
        else:
            raise ValueError(f"Subject {subject} already exists with a different weight.")

    def calculate_average(self):
        """
        计算总成绩和加权平均分
        """
        total_score = sum(grade['grade'] * grade['weight'] for grade in self.grades.values())
        weighted_avg = total_score / sum(weight for grade in self.grades.values())
        return weighted_avg

    def display_report(self):
        print(f"Student: {self.name}")
        total_grades = "\n".join(f"{subject}: Grade - {grades['grade']} (Weight: {grades['weight']})" for subject, grades in self.grades.items())
        print("Grade Report:\n", total_grades)
        print(f"Average Score: {self.calculate_average()}")

# 示例
student1 = Student("张三")
student1.add_grade('数学', 90, 2)
student1.add_grade('语文', 85, 1)
student1.add_grade('英语', 95, 1.5)  # 示例中加权分数

student1.display_report()

在这个例子中，我们创建了一个`Student`类，它有姓名、成绩字典和一些方法。用户可以添加成绩和查看报告，以及计算加权平均分。