Python Programs Collection This repository contains a well-structured collection of Python programs demonstrating a broad range of core and advanced concepts, including: Basic programming constructs Object-Oriented Programming (OOP) File handling Regular expressions Modular programming MongoDB operations via PyMongo Web development using Django Real-world simulations (ATM, Library, Vehicle, etc.) Each module is accompanied by example outputs and is organized to provide clarity, best practices, and ease of understanding for learners and developers.

🧩 Overview of Categories ✅ Category 1 – Core Python Fundamentals Calculating the area of a circle Reversing user input (name) Converting string input to list and tuple Checking if a number is even or odd Concatenating multiple strings using loops

➕ Category 2 – Arithmetic Operations and Utilities Performing addition and division Calculating the area of a triangle Swapping variable values Generating random numbers Converting kilometers to miles Displaying calendars using the calendar module Determining leap years

🔁 Category 3 – Working with Dictionaries and Sets Managing a dictionary of books (Create, Read, Update, Delete) Performing operations on sets (add, discard, filter by character) Extracting keys and values Set comprehensions and length calculation

🔢 Category 4 – Lists and Tuples with Mathematical Logic Calculating GCD of two numbers Summing digits of a number Generating multiples of 3 Managing lists of movies (sorting, slicing, filtering) Tuple operations and immutability demonstration

🔠 Category 5 – Looping and Pattern Generation Printing even numbers up to a given limit Printing each character of a string on a new line Displaying various patterns (numeric, alphabetic, binary) Finding ASCII values Implementing a simple calculator Identifying the largest number in a list

Adding two matrices

🧮 Category 6 – Functions and String Analysis Calculating sum of even and odd numbers using functions Checking for palindromes Counting vowels, consonants, and spaces Finding common characters in two strings Calculating percentage based on marks Generating Fibonacci sequence Removing duplicate words and sorting them Simulating stack operations using *args

🧱 Category 7 – Object-Oriented Programming (OOP) Drug formulation simulation using Abstraction, Encapsulation, Inheritance, and Polymorphism Simulated Bank Account system with transaction methods Inheritance with Vehicle → Car → ElectricCar hierarchy Gender-based class design using inheritance Prescribing medicines using polymorphism

📍 Category 8 – Custom Class-Based Simulations Point class with mathematical and logical operations Watch class for time display and alarm management ATM interface with encapsulated PIN and balance Modular package (library) for book management Simple calculator module with basic arithmetic

🔍 Category 9 – Regular Expression Applications Extracting dates, numbers, and words from text Finding words starting with vowels or consonants Validating input patterns (e.g., string endings, number formats) Filtering words of minimum length using regex

🌐 Category 10 – Django-Based Web Projects Minimal Django project displaying "Hello, Django!" Basic To-Do List web application Blog platform with CRUD, user authentication, categories, and comments E-commerce system with cart, checkout, and payment integration

🧾 Category 11 – MongoDB Integration with PyMongo Inserting single and multiple documents Fetching documents by field or condition Updating and deleting documents (single/multiple) Data projection, sorting, limiting, and skipping Index creation and aggregation pipelines ($group, $match, $project)

Pagination and remote database connection (MongoDB Atlas)

📦 Category 12 – Python Modules and Package Structure Custom package: library (includes add_book, search_book, display_books) Standalone module: calculator.py for addition, subtraction, multiplication, and division

🏦 Category 13 – ATM Interface Simulation Secure ATM system using encapsulation and PIN verification Features include balance checking, deposits, withdrawals Interactive CLI interface with validation and conditionals

🚀 Getting Started Run any script individually using: python filename.py

📚 Requirements Python 3.x MongoDB & pymongo Django (for web apps)

For Django and MongoDB modules, ensure the following packages are installed: pip install django pymongo

📁 Folder Structure python-programs/ │ ├── basic/ ├── functions/ ├── oops/ ├── regex/ ├── mongo/ ├── django/ ├── modules/ └── simulations/

This repository is intended for educational purposes. You are free to reuse and modify the code for personal or academic projects. You Can Modify it for Your Purpose