创建 SchoolMem 类，该类中包含三种属性：姓名、性别、年龄以及针对每个属性的 get 和 set 方法。

好的，以下是 SchoolMem 类的代码示例：

class SchoolMem:
    def __init__(self, name, gender, age):
        self._name = name
        self._gender = gender
        self._age = age

    def get_name(self):
        return self._name

    def set_name(self, name):
        self._name = name

    def get_gender(self):
        return self._gender

    def set_gender(self, gender):
        self._gender = gender

    def get_age(self):
        return self._age

    def set_age(self, age):
        self._age = age

在这个类中，我们使用了构造函数 `__init__` 来初始化实例时所需的属性。然后，我们为每个属性创建了一个 `get` 和 `set` 方法，以便在需要时获取和设置属性的值。注意，我们在属性前面添加了下划线 `_`，这是一种约定，表示这些属性应该被视为私有属性，应该通过类中的方法来访问和修改，而不是直接访问。

相关问题

编写程序，创建 People 类，该类中包含三种属性：姓名、性别、年龄以及针对每个属性的 get 和 set 方法。创建 Student 类，继承自 People 类，添加额外三个属性：学号、班级和数量统计。 创建 Teacher 类，继承自 People 类，添加额外三个属性：工号、学院和数量统计。要求在 Student 类 和 Teacher 类中分别实现 printInfo 方法，该方法打印对象的多有属性信息。

好的，以下是 Python 代码实现：

class People:
    def __init__(self, name, gender, age):
        self.name = name
        self.gender = gender
        self.age = age
    
    def get_name(self):
        return self.name
    
    def set_name(self, name):
        self.name = name
    
    def get_gender(self):
        return self.gender
    
    def set_gender(self, gender):
        self.gender = gender
    
    def get_age(self):
        return self.age
    
    def set_age(self, age):
        self.age = age

class Student(People):
    count = 0
    
    def __init__(self, name, gender, age, student_id, class_name):
        super().__init__(name, gender, age)
        self.student_id = student_id
        self.class_name = class_name
        Student.count += 1
    
    def print_info(self):
        print("Name:", self.name)
        print("Gender:", self.gender)
        print("Age:", self.age)
        print("Student ID:", self.student_id)
        print("Class Name:", self.class_name)

class Teacher(People):
    count = 0
    
    def __init__(self, name, gender, age, teacher_id, college):
        super().__init__(name, gender, age)
        self.teacher_id = teacher_id
        self.college = college
        Teacher.count += 1
    
    def print_info(self):
        print("Name:", self.name)
        print("Gender:", self.gender)
        print("Age:", self.age)
        print("Teacher ID:", self.teacher_id)
        print("College:", self.college)

其中，`People` 类是基类，包含三个属性和对应的 `get` 和 `set` 方法。`Student` 类继承自 `People` 类，添加了学号、班级属性和数量统计属性 `count`，并实现了 `print_info` 方法。`Teacher` 类同理。

下面是使用示例：

# 创建两个学生对象
s1 = Student("Tom", "male", 18, "001", "Class A")
s2 = Student("Lucy", "female", 17, "002", "Class B")

# 调用 print_info 方法打印信息
s1.print_info()
s2.print_info()

# 创建两个教师对象
t1 = Teacher("John", "male", 35, "1001", "College of Science")
t2 = Teacher("Mary", "female", 28, "1002", "College of Arts")

# 调用 print_info 方法打印信息
t1.print_info()
t2.print_info()

# 打印学生和教师数量统计
print("Number of students:", Student.count)
print("Number of teachers:", Teacher.count)

输出结果如下：

Name: Tom
Gender: male
Age: 18
Student ID: 001
Class Name: Class A
Name: Lucy
Gender: female
Age: 17
Student ID: 002
Class Name: Class B
Name: John
Gender: male
Age: 35
Teacher ID: 1001
College: College of Science
Name: Mary
Gender: female
Age: 28
Teacher ID: 1002
College: College of Arts
Number of students: 2
Number of teachers: 2

编写程序，创建计算类，要求输入半径，计算圆的周长和面积，以及球的表面积和体积。 2、编写程序，创建 People 类，该类中包含三种属性：姓名、性别、年龄以及针对每个属性的 get 和 set 方法。创建 Student 类，继承自 People 类，添加额外三个属性：学号、班级和数量统计。 创建 Teacher 类，继承自 People 类，添加额外三个属性：工号、学院和数量统计。要求在 Student 类 和 Teacher 类中分别实现 printInfo 方法，该方法打印对象的多有属性信息。

1. 计算类计算圆周长、面积、球表面积和体积的程序：

import math

class Calculation:
    def __init__(self, radius):
        self.radius = radius
    
    def circle_perimeter(self):
        return 2 * math.pi * self.radius
    
    def circle_area(self):
        return math.pi * self.radius ** 2
    
    def sphere_surface_area(self):
        return 4 * math.pi * self.radius ** 2
    
    def sphere_volume(self):
        return 4/3 * math.pi * self.radius ** 3

# 测试代码
calc = Calculation(5)
print("圆的周长为：{:.2f}".format(calc.circle_perimeter()))
print("圆的面积为：{:.2f}".format(calc.circle_area()))
print("球的表面积为：{:.2f}".format(calc.sphere_surface_area()))
print("球的体积为：{:.2f}".format(calc.sphere_volume()))

2. People、Student、Teacher 类的程序：

class People:
    def __init__(self, name, gender, age):
        self.name = name
        self.gender = gender
        self.age = age
    
    def get_name(self):
        return self.name
    
    def set_name(self, name):
        self.name = name
    
    def get_gender(self):
        return self.gender
    
    def set_gender(self, gender):
        self.gender = gender
    
    def get_age(self):
        return self.age
    
    def set_age(self, age):
        self.age = age

class Student(People):
    count = 0
    def __init__(self, name, gender, age, student_id, student_class):
        super().__init__(name, gender, age)
        self.student_id = student_id
        self.student_class = student_class
        Student.count += 1
    
    def get_student_id(self):
        return self.student_id
    
    def set_student_id(self, student_id):
        self.student_id = student_id
    
    def get_student_class(self):
        return self.student_class
    
    def set_student_class(self, student_class):
        self.student_class = student_class
    
    def print_info(self):
        print("姓名：{}\n性别：{}\n年龄：{}\n学号：{}\n班级：{}".format(
            self.name, self.gender, self.age, self.student_id, self.student_class))

class Teacher(People):
    count = 0
    def __init__(self, name, gender, age, teacher_id, college):
        super().__init__(name, gender, age)
        self.teacher_id = teacher_id
        self.college = college
        Teacher.count += 1
    
    def get_teacher_id(self):
        return self.teacher_id
    
    def set_teacher_id(self, teacher_id):
        self.teacher_id = teacher_id
    
    def get_college(self):
        return self.college
    
    def set_college(self, college):
        self.college = college
    
    def print_info(self):
        print("姓名：{}\n性别：{}\n年龄：{}\n工号：{}\n学院：{}".format(
            self.name, self.gender, self.age, self.teacher_id, self.college))

# 测试代码
s = Student("张三", "男", 20, "20190101", "计算机科学与技术")
s.print_info()
print("学生总数：{}".format(Student.count))

t = Teacher("李四", "女", 30, "10001", "计算机科学与技术")
t.print_info()
print("教师总数：{}".format(Teacher.count))

注意，在子类 Student 和 Teacher 中都添加了一个 count 类属性，用于统计创建的对象个数，这个属性在每个子类中都独立存在，不会相互影响。同时，在每个子类中都实现了 print_info 方法，用于打印对象的各个属性信息。