Modularity

Modularity:

• In software (Modular Programming), large programs are broken into smaller, manageable sub-programs or functions.
• Each module handles one aspect of functionality, improving readability, debugging, and reusability.

Core Concepts of Python Modularity:

1. Modules
2. Packages

3. Import System

4. Module:

• A Python module is a file containing Python definitions and statements (such as functions, classes, and variables) with a .py extension.

• It allows you to logically organize, reuse, and share your code across different programs.
  Uses of modules:

• Code Reusability

• Maintainability

• Namespacing

Create a module:

• Save a file named function_demo.py With the following content

def add(no1, no2):
    return no1 + no2

def subtract(no1, no2):
    return no1 - no2

def multiply(no1, no2):
    return no1 * no2

def divide(no1, no2):
    return no1 // no2

developer = 'nimal anand'

Import the module:

• Use the import keyword in another Python file to use that code

import function_demo

result = function_demo.add(100,150)

print(result)

print(function_demo.developer)
print(type (function_demo))

Output:

250
nimal anand
<class:'module'>

The type() Function

• Returns the exact class type of an object. Example:

x = 10
print(type(x))
Output:
class 'int'

pycache:

• pycache is a directory created automatically by Python to store compiled bytecode (.pyc files).

Difference between file vs module:

duck typing language:

• Duck typing is a programming style where an object's suitability is determined by the presence of specific methods and properties rather than its actual class or explicit type inheritance.

ASCII:

• ASCII stands for American Standard Code for Information Interchange.

• It is a system that gives a unique number from 0 to 127 to English letters, numbers, and symbols so computers can read text.
  ISCII:

• ISCII stands for Indian Standard Code for Information Interchange.

• It maps 256 total characters, blending standard English text compatibility with native Indic alphabets.