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