what is a class in python

                                    A class is a block of code that holds various functions. Because they
are located inside a class they are named methods but mean the samne
thing. In addition variables that are stored inside a class are named 
attributes. The point of a class is to call the class later allowing you 
to access as many functions or (methods) as you would like with the same
class name. These methods are grouped together under one class name due
to them working in association with eachother in some way.

                                    class Person:
  def __init__(self, _name, _age):
    self.name = _name
    self.age = _age
   
  def sayHi(self):
    print('Hello, my name is ' + self.name + ' and I am ' + self.age + ' years old!')
    
p1 = Person('Bob', 25)
p1.sayHi() # Prints: Hello, my name is Bob and I am 25 years old!

                                    class Fan:

    def __init__(self, company, color, number_of_wings):
        self.company = company
        self.color = color
        self.number_of_wings = number_of_wings
        
    def PrintDetails(self):
        print('This is the brand of',self.company,'its color is', self.color,' and it has',self.number_of_wings,'petals')
    
        
    def switch_on(self):
        print("fan started")
        
    def switch_off(self):
        print("fan stopped")
        
    def speed_up(self):
        print("speed increased by 1 unit")
        
    def speed_down(self):
        print("speed decreased by 1 unit")
        
usha_fan = Fan('usha','skin',5)
fan = Fan('bajaj','wite', 4)


print('these are the details of this fan')
usha_fan.PrintDetails()
print()

usha_fan.switch_on()

                                    # To create a simple class:
class Shape:
  	def __init__():
      	print("A new shape has been created!")
      	pass
    
    def get_area(self):
		pass

# To create a class that uses inheritance and polymorphism
# from another class:
class Rectangle(Shape):
  
	def __init__(self, height, width): # The constructor
    	super.__init__()
        self.height = height
    	self.width = width

	def get_area(self):
      	return self.height * self.width

                                    class Mammal:
    def __init__(self, name):
        self.name = name

    def walk(self):
        print(self.name + " is going for a walk")


class Dog(Mammal):
    def bark(self):
        print("bark!")


class Cat(Mammal):
    def meow(self):
        print("meow!")


dog1 = Dog("Spot")
dog1.walk()
dog1.bark()
cat1 = Cat("Juniper")
cat1.walk()
cat1.meow()