用python创建学生信息管理系统要求添加学生信息 删除学生信息 修改学生信息 查询学生信息 统计学生信息，包括学生的姓名、学号、年龄、性别、班级等信息，并注释

好的，下面是一个简单的示例代码，包括添加学生信息、删除学生信息、修改学生信息、查询学生信息和统计学生信息的功能，并添加了注释说明。

class Student:
    def __init__(self, name, student_id, age, gender, class_name):
        self.name = name
        self.student_id = student_id
        self.age = age
        self.gender = gender
        self.class_name = class_name

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

    # 添加学生信息
    def add_student(self, name, student_id, age, gender, class_name):
        student = Student(name, student_id, age, gender, class_name)
        self.students.append(student)
        print("学生信息添加成功！")

    # 删除学生信息
    def remove_student(self, student_id):
        for student in self.students:
            if student.student_id == student_id:
                self.students.remove(student)
                print("学生信息删除成功！")
                return
        print("学生信息不存在！")

    # 修改学生信息
    def edit_student(self, student_id, name=None, age=None, gender=None, class_name=None):
        for student in self.students:
            if student.student_id == student_id:
                if name:
                    student.name = name
                if age:
                    student.age = age
                if gender:
                    student.gender = gender
                if class_name:
                    student.class_name = class_name
                print("学生信息修改成功！")
                return
        print("学生信息不存在！")

    # 查询学生信息
    def query_student(self, student_id=None, name=None):
        if student_id:
            for student in self.students:
                if student.student_id == student_id:
                    return student
        elif name:
            for student in self.students:
                if student.name == name:
                    return student
        else:
            return self.students
        print("学生信息不存在！")

    # 统计学生信息
    def count_student(self):
        print("学生总数为：", len(self.students))


# 创建学生管理器对象
manager = StudentManager()

# 添加学生信息
manager.add_student("张三", "001", 18, "男", "一班")
manager.add_student("李四", "002", 19, "女", "二班")
manager.add_student("王五", "003", 20, "男", "三班")

# 删除学生信息
manager.remove_student("002")

# 修改学生信息
manager.edit_student("001", name="张三丰", age=20)

# 查询学生信息
print(manager.query_student(student_id="001").name)
print(manager.query_student(name="王五").student_id)
print(manager.query_student())

# 统计学生信息
manager.count_student()

以上代码仅为示例，具体实现方式可以根据实际需求进行调整。