Python Day-18 Nested for loop -pattern,OOPS-Object Oriented Programming System

Pattern Formation-Continuation
14)

for row in range(5):
    for col in range(row):
        print("* ", end=' ')
    for col in range(5-row):
        print(col+1, end=' ')
    print()

Output:

1 2 3 4 5 
* 1 2 3 4 
* * 1 2 3 
* * * 1 2 
* * * * 1 

OOPS-Object Oriented Programming System:

-->Python is a multi-paradigm language.
-->In Python object-oriented Programming (OOPs) is a programming paradigm that uses objects and classes in programming.

Few oops concepts:
Class-->Template or blueprint of an idea(Logical entity).
-->Class is collection of objects.
object-->Object is a physical or real-time or real world entity.
It contains states(attributes) and behaviour(methods).
-->Object is representation of class.

Example for state & behaviour-Water bottle
*State-->Capacity of that water bottle(litres),Madeup of which material
*Behaviour-->Filling,washing,opening,closing the bottle.

Note:

Class can be presented without objects,but objects cannot be created without class.

Example for class and object: Invitation
class-Many templates are available for printing invitation.So each templates represent class.
Object-If we have selected one template and got physical copy of invitation that invitation copy will be object ,which is physical or real world entity

Encapsulation
-->It protects your classes from accidental changes or deletions and promotes code reusability and maintainability.
-->This function cannot be used by any other.
-->Defined using special variable with __ (docker).

Example-

class company:
    def __research():
        pass
    def __give_salary():
        pass

co=company()
co.__research()

In this example if a company wants to protect their research and salary data encapsulation can be used.

Python modules:
-->To install python modules use sudo apt install python3-modulename command in your terminal.

1) Emoji Module:

import emoji
result = emoji.emojize('Python is :thumbs_up:')
print(result)

# You can also reverse this:
result = emoji.demojize('Python is 👍')
print(result)

Output:

Python is 👍
Python is :thumbs_up: