how to use a class in python

1class Mammal:
2    def __init__(self, name):
3        self.name = name
4
5    def walk(self):
6        print(self.name + " is going for a walk")
7
8
9class Dog(Mammal):
10    def bark(self):
11        print("bark!")
12
13
14class Cat(Mammal):
15    def meow(self):
16        print("meow!")
17
18
19dog1 = Dog("Spot")
20dog1.walk()
21dog1.bark()
22cat1 = Cat("Juniper")
23cat1.walk()
24cat1.meow()

1class Person:
2  def __init__(self, _name, _age):
3    self.name = _name
4    self.age = _age
5   
6  def sayHi(self):
7    print('Hello, my name is ' + self.name + ' and I am ' + self.age + ' years old!')
8    
9p1 = Person('Bob', 25)
10p1.sayHi() # Prints: Hello, my name is Bob and I am 25 years old!

1class MyClass(object):
2  def __init__(self, x):
3    self.x = x

1class Person:
2  def __init__(self, name, age):
3    self.name = name
4    self.age = age
5  def myfunc(self):
6    print("Hello my name is " + self.name +".")
7
8p1 = Person("Victor", 24)
9p1.myfunc()

1class LuckyLemur():
2  	def __init__(self, description):
3		self.description = description
4	
5    def reveal_description(self):
6    	print(f'Lucky Lemur is {self.description}')
7
8lucky_lemur = LuckyLemur('Pro')
9lucky_lemur.reveal_description()

1class awwab(object):
2    def __init__(self, name, age):
3        self.name = name
4        self.age = age
5    
6    def speak(self):
7        print("Hello, my name is",self.name,"and I am",self.age,"years old!")
8        
9awwabasad = awwab("Awwab Asad", 11)
10print(awwabasad.speak())