设计学生类Student和学生管理类StudentManger。

以下是一个简单的示例：

class Student:
    def __init__(self, name, age, gender, id):
        self.name = name
        self.age = age
        self.gender = gender
        self.id = id
    
    def __str__(self):
        return f"{self.name} ({self.age}, {self.gender}) - ID: {self.id}"
    
class StudentManager:
    def __init__(self):
        self.students = []
    
    def add_student(self, student):
        self.students.append(student)
        print(f"Student {student.name} added.")
    
    def remove_student(self, student_id):
        for student in self.students:
            if student.id == student_id:
                self.students.remove(student)
                print(f"Student {student.name} removed.")
                return
        print(f"Student with ID {student_id} not found.")
    
    def display_students(self):
        print("List of students:")
        for student in self.students:
            print(student)

在上面的代码中，`Student` 类表示学生，包含姓名、年龄、性别和 ID 属性。 `StudentManager` 类用于管理学生，可以添加、删除和显示学生。

要使用这些类，可以创建一个 `StudentManager` 对象，然后调用其方法，如下所示：

manager = StudentManager()

s1 = Student("Alice", 18, "Female", 1001)
manager.add_student(s1)

s2 = Student("Bob", 19, "Male", 1002)
manager.add_student(s2)

manager.display_students()

manager.remove_student(1001)

manager.display_students()

以上代码将会输出：

Student Alice added.
Student Bob added.
List of students:
Alice (18, Female) - ID: 1001
Bob (19, Male) - ID: 1002
Student Alice removed.
List of students:
Bob (19, Male) - ID: 1002