PYTHON

how to make a class in python

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!

create and use python classes

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()

how to declare a class in python

class ClassName(object): #"(object)" isn't mandatory unless this class inherit from another
  	def __init__(self, var1=0, var2):
    
    	#the name of the construct must be "__init__" or it won't work
    	#the arguments "self" is mandatory but you can add more if you want 
    	self.age = var1
    	self.name = var2
    
    	#the construct will be execute when you declare an instance of this class
    
  	def otherFunction(self):
    	
        #the other one work like any basic fonction but in every methods,
    	#the first argument (here "self") return to the class in which you are
 	

classes in python

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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()

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.

how to define a class in python

class Person:
  def __init__(self, name, age):
    self.name = name
    self.age = age

    def say_name(self):
      print(f"Hello, I am {self.name}")

p1 = Person("Sara", 18)
p1.say_name() 

creating class and object in python

class Parrot:

    # class attribute
    species = "bird"

    # instance attribute
    def __init__(self, name, age):
        self.name = name
        self.age = age

# instantiate the Parrot class
blu = Parrot("Blu", 10)
woo = Parrot("Woo", 15)

# access the class attributes
print("Blu is a {}".format(blu.__class__.species))
print("Woo is also a {}".format(woo.__class__.species))

# access the instance attributes
print("{} is {} years old".format( blu.name, blu.age))
print("{} is {} years old".format( woo.name, woo.age))

Creating Class and Object in Python

class Parrot:
    # class attribute
    species = "bird"
    # instance attribute
    def __init__(self, name, age):
        self.name = name
        self.age = age

# instantiate the Parrot class
blu = Parrot("Blu", 10)
woo = Parrot("Woo", 15)

# access the class attributes
print("Blu is a {}".format(blu.__class__.species))
print("Woo is also a {}".format(woo.__class__.species))

# access the instance attributes
print("{} is {} years old".format( blu.name, blu.age))
print("{} is {} years old".format( woo.name, woo.age))

Class in python

# Node class
class Node:
  
    # Function to initialize the node object
    def __init__(self, data):
        self.data = data  # Assign data
        self.next = None  # Initialize
                          # next as null
  
# Linked List class
class LinkedList:
    
    # Function to initialize the Linked
    # List object
    def __init__(self):
        self.head = None

classes in python

class Foo:
  def __init__(self):
    self.definition = Foo!
  def hi():
    # Some other code here :)
    
# Classes require an __init__ if you want to assign attributes. (self) defines what describes the attribs.
      

objects and classes in python

class IntellipaatClass:
	a = 5
	def function1(self):
		print(‘Welcome to Intellipaat’)
#accessing attributes using the class object of same name
IntellipaatClass.function(1)
print(IntellipaatClass.a)

what is an object in python

#objects are collections of data

class in python

class LuckyLemur():
  	def __init__(self, description):
		self.description = description
	
    def reveal_description(self):
    	print(f'Lucky Lemur is {self.description}')

lucky_lemur = LuckyLemur('Pro')
lucky_lemur.reveal_description()

creating python classes

class car:
  def __init__(self, model, color):
    self.model = model
    self.color = color
         
tesla = car("model 3", "black")

how to use a class in python

class awwab(object):
    def __init__(self, name, age):
        self.name = name
        self.age = age
    
    def speak(self):
        print("Hello, my name is",self.name,"and I am",self.age,"years old!")
        
awwabasad = awwab("Awwab Asad", 11)
print(awwabasad.speak())

Python classes and objects

class Person:
    def __init__(self, name, age, gender):
        self.name = name
        self.age = age
        self.gender = gender

    def greet(self, person_to_greet):
        # person_to_greet will be another Person object
        print(f"Hey {person_to_greet.name}, nice to meet you I'm {self.name}")

    def ask_age(self, ask_from):
        print(f"{self.name}: {ask_from.name}, How old are you?")
        print(f"{ask_from.name}: i am {ask_from.age}")


# Creating a person object
tom = Person("Tom", 50, "Male")

# we can also create an object with keyword arguments
jack = Person(name="Jack", age=19, gender="Male")

# Here we call the greet method of tom, and we pass the Jack Person Object Created above
tom.greet(jack)

# if we call the greet method of jack and pass the Tom person object, then jack greets tom
jack.greet(tom)

# Here Jack will ask age of tom, and tom will reply with his age
jack.ask_age(tom)

Python Class Example

#Source: https://vegibit.com/python-class-examples/
class Vehicle:
    def __init__(self, brand, model, type):
        self.brand = brand
        self.model = model
        self.type = type
        self.gas_tank_size = 14
        self.fuel_level = 0

    def fuel_up(self):
        self.fuel_level = self.gas_tank_size
        print('Gas tank is now full.')

    def drive(self):
        print(f'The {self.model} is now driving.')

obj = Vehicle("Toyota", "Carola", "Car")
obj.drive()

Python class example

class Greet:
	def __init__(self, names):
    	self.names = names

	def say_hello(self):
    	for name in self.names:
        	print("Hello " + name)

simple python class

class Person:
    def say_hi(self):
        print('Hello, how are you?')

p = Person()
p.say_hi()
# The previous 2 lines can also be written as
# Person().say_hi()

python how to create a class

class class_name:
	def __init__(self):
    	# class variables(can be used all over the class)
        pass
first_class = class_name() # creating the class

classes in python

>>> print(ObjectCreator) # you can print a class because it's an object
<class '__main__.ObjectCreator'>
>>> def echo(o):
...       print(o)
...
>>> echo(ObjectCreator) # you can pass a class as a parameter
<class '__main__.ObjectCreator'>
>>> print(hasattr(ObjectCreator, 'new_attribute'))
False
>>> ObjectCreator.new_attribute = 'foo' # you can add attributes to a class
>>> print(hasattr(ObjectCreator, 'new_attribute'))
True
>>> print(ObjectCreator.new_attribute)
foo
>>> ObjectCreatorMirror = ObjectCreator # you can assign a class to a variable
>>> print(ObjectCreatorMirror.new_attribute)
foo
>>> print(ObjectCreatorMirror())
<__main__.ObjectCreator object at 0x8997b4c>

what is a class in python

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Classes are blueprint used to construct objects

can you make a class in a class python

# Yes 
class Main:
  # outer class
  class Inner():
    # inner class
    pass

Defining a Class in Python

class MyNewClass:
    '''This is a docstring. I have created a new class'''
    pass

python classes and objects

class employee:
    name = ''
    id = 0
    department = ''

    def pay(self):
        print(self.name, self.id, self.department)


s = employee()
s.name = 'burhan'
s.id = 0o2234523
s.department = 'Development'
s.pay()

b = employee()
b.name = 'Abdullah'
b.id =12423432857
b.department = 'Software Engineer'
b.pay()

c = employee()
c.name = 'Bilal'
c.id =12423432857
c.department = 'Software Engineer'
c.pay()

classes in python

fromr random import radint

Asnwer= randint(1,200)
count= 0

while true:
  guess  = getingeger("whatis yourestimate")
  if guess< 1 or guess > 200:
    print(your estimate must be between 1 and 200)
    
    continue
    
  count+ = 1
  if guess < answer:
    print("higher")
  elif guess > answer:
    print("lower")
  else:
    print("you guessed it!")
    
if count== 1
	print("wow first try!!")

  else:
    print("you estimated it in, count,'time'")

class python example

def ok(index):
    print(index) > Hi!
ok("Hi!")
class Lib:
    def ok(self,Token):
        print(Token) > Hello World!
Library = Lib()
Library.ok("Hello World!")

classes in python

class fruit:
  def __init__(self,color,taste,name):
    self.color = color
    self.name = name
    self.taste = taste
    
    def myfunc(self):
      print("{} = Taste:{}, Color:{}".format(self.name, self.taste, self.color))
      
f1 = fruit("Red", "Sweet", "Red Apple")
f1.myfunc()

python object creation

def dump(obj):
  for attr in dir(obj):
    print("obj.%s = %r" % (attr, getattr(obj, attr)))

Creating an Object in Python

>>> harry = Person()

python class declaration

#Testing
class Class_Def:
  def __init__(self):
    pass