Python on codeverra

Advanced LLD Topics: A Deep Dive

Fri, 04 Sep 2026 00:00:00 +0000

Advanced low-level design topics for real systems, interviews, and production code: building on SOLID and design patterns.

Design Patterns, Part 1: Foundations and Creational Patterns

Fri, 04 Sep 2026 00:00:00 +0000

Foundations of the GoF design pattern catalogue and creational patterns: Singleton, Factory, Builder, Prototype, and Abstract Factory.

Design Patterns, Part 2: Structural Patterns

Fri, 04 Sep 2026 00:00:00 +0000

Structural design patterns: how to combine classes and objects into larger structures that stay flexible and maintainable.

Design Patterns, Part 3: Behavioral Patterns

Fri, 04 Sep 2026 00:00:00 +0000

Behavioral design patterns: how objects communicate, divide responsibility, and coordinate behavior in complex systems.

Design Patterns: Practice Workbook

Fri, 04 Sep 2026 00:00:00 +0000

Hands-on design pattern practice problems to prove you understand creational, structural, and behavioral patterns.

LLD Foundations - SOLID Principles

Fri, 04 Sep 2026 00:00:00 +0000

A complete guide to solid principles which are fundamental of object oriented design.

Object-Oriented Programming in Python: A Deep Dive

Fri, 04 Sep 2026 00:00:00 +0000

A complete guide to Python OOP: why it exists, what problems it solves, and how to wield it well in real systems.

SOLID Principles: A Complete Deep Dive

Fri, 04 Sep 2026 00:00:00 +0000

A rigorous treatment of the five SOLID principles: formal statements, worked examples, tradeoffs, and when not to apply them.

SOLID Principles: A Complete Deep Dive

Fri, 04 Sep 2026 00:00:00 +0000

A rigorous treatment of the five SOLID principles: formal statements, worked examples, tradeoffs, and when not to apply them.

Control Flow in Python

Sat, 21 Mar 2026 00:00:00 +0000

Control Flow in Python

Making Decisions in Your Code – if, elif, else, and Beyond

Before We Begin – Why Control Flow is Everything

Every program you have ever used makes decisions.

When you log into a website: if the password is correct, show the dashboard, otherwise show an error. When your food delivery app calculates the delivery fee: if the order is above Rs.200, delivery is free, else charge Rs.30. When a data pipeline processes records: if the record is valid, process it, else log an error and skip it.

Logging and System Interaction in Python

Sat, 21 Mar 2026 00:00:00 +0000

Logging and System Interaction in Python

Professional Observability with the logging Module and the os Module

Before We Begin – Why This Matters More Than It Looks

Here is a situation every developer eventually faces.

You write a script that processes data overnight. It runs on a server while you sleep. In the morning you check the output and something is wrong. Half the records are missing. You have no idea what happened because your script used print() for all its messages and those prints went nowhere – there was nobody watching the terminal.

Modules, Packages, and the Python Ecosystem

Sat, 21 Mar 2026 00:00:00 +0000

Understand how Python modules and packages work, how to create your own, and how to navigate the Python ecosystem.

Object-Oriented Programming in Python - Masterclass

Sat, 21 Mar 2026 00:00:00 +0000

A comprehensive guide to OOP in Python - classes, objects, inheritance, encapsulation, and polymorphism.

OOP Practice - Problems and Solutions

Sat, 21 Mar 2026 00:00:00 +0000

Object-Oriented Programming – Assignment

Four Real-World Problems to Solve Using OOP

This assignment covers OOP Basics and Intermediate concepts. For each problem, read the description carefully, understand what the system needs to do, and design your classes before writing any code. Planning on paper first is not optional – it is part of the exercise.

How to Approach Each Problem

Before writing a single line of code for any problem:

Python Basics Masterclass

Sat, 21 Mar 2026 00:00:00 +0000

A complete beginner-friendly guide to Python basics - syntax, data types, variables, and core concepts.

Python Collections - Theory

Sat, 21 Mar 2026 00:00:00 +0000

Python Collections

Lists, Tuples, Dictionaries, and Sets – The Four Ways to Store Data

Before We Begin – Why Collections Are Central to Everything

At some point you stop writing programs that work on one value at a time and start writing programs that work on many values at once. A list of students. A dictionary of city populations. A set of unique tags. A tuple representing a coordinate.

Collections are the bridge between “I know Python basics” and “I can solve real problems.” Everything that follows in this curriculum – loops, functions, Pandas, APIs – assumes you are comfortable with collections.

Python Learning Roadmap

Sat, 21 Mar 2026 00:00:00 +0000

A structured roadmap to learning Python from scratch to advanced - what to learn, in what order, and why.

Python Loops Masterclass

Sat, 21 Mar 2026 00:00:00 +0000

🔁 Python Loops Masterclass

Complete Command Over for and while Loops — From Basics to Patterns

Who is this for? You know Python basics — variables, conditionals, functions. Now you want to truly master loops — not just use them, but think in them. This guide covers every loop concept in Python, with simple examples before every idea.

📌 Table of Contents

Why Loops Exist
The for Loop
Iterating Over Different Data Types
The range() Function
The while Loop
break — Exit the Loop Early
continue — Skip to the Next Iteration
pass — Do Nothing (Placeholder)
else with Loops
enumerate() — Loop with an Index
zip() — Loop Over Multiple Sequences
Nested Loops
List Comprehensions
Dictionary and Set Comprehensions
Loop Patterns Every Programmer Uses
Common Loop Mistakes and How to Avoid Them
Practice Questions
What We Covered + What’s Next

1. Why Loops Exist

Imagine you need to print a welcome message for 500 students. Without loops:

Python Refresher for DSA

Sat, 21 Mar 2026 00:00:00 +0000

A quick refresher on the Python concepts you need before diving into Data Structures and Algorithms.

Regular Expressions in Python

Sat, 21 Mar 2026 00:00:00 +0000

Regular Expressions in Python

Pattern Matching, Text Processing, and the re Module

Before We Begin – Why Regular Expressions Matter

Here is a real problem. You have a CSV file with 50,000 rows of customer data. The phone number column is a mess:

+91-9876543210
9876 543 210
(091) 9876-543210
91-98765-43210
9876543210
+919876543210

All of these are the same phone number in different formats. You need to extract just the 10-digit number from all of them.

Strings in Python - Complete Guide

Sat, 21 Mar 2026 00:00:00 +0000

A practical guide to string operations and manipulation in Python for DSA problem solving.

Type Hints in Python

Sat, 21 Mar 2026 00:00:00 +0000

Type Hints in Python

Writing Code That Explains Itself – The typing Module and Beyond

Before We Begin – Why Type Hints Matter

Here is a function:

def calculate_discount(price, discount, is_member):
 ...

What type is price? A float? An int? A string like "1299"? What is discount? A percentage like 18.5? Or a multiplier like 0.185? What does is_member do to the result?

You cannot tell without reading the implementation. In a codebase with hundreds of functions, this adds up to an enormous cognitive load.

Working with the Real World in Python

Sat, 21 Mar 2026 00:00:00 +0000

Learn how Python interacts with real-world systems - APIs, files, databases, and external libraries.

Complete Guide to Numpy Library in Python

Wed, 18 Mar 2026 00:00:00 +0000

Complete practice session on Numpy in python

Complete Guide to Pandas in Python

Wed, 18 Mar 2026 00:00:00 +0000

Complete practice session on Pandas in python

Master Collections in Python

Wed, 18 Mar 2026 00:00:00 +0000

Complete practice session on collections in python

Master Loops in Python

Wed, 18 Mar 2026 00:00:00 +0000

Complete practice session on Loops in python

Numpy Masterclass - Beginner to Advanced

Wed, 18 Mar 2026 00:00:00 +0000

Get a comprehensive introduction to Numpy library in python

Pandas Masterclass - Beginner to Advanced

Wed, 18 Mar 2026 00:00:00 +0000

Get a comprehensive introduction to pandas library in python

Exception Handling in Python - Complete Guide

Tue, 17 Mar 2026 00:00:00 +0000

Learn about try-except-finally and custom exceptions in Python

File Handling in Python - Complete Guide

Tue, 17 Mar 2026 00:00:00 +0000

Learn about working with files in Python

Functions in Python - Complete Guide

Tue, 17 Mar 2026 00:00:00 +0000

Learn everything about writing fcuntions in Python

Higher Order Functions and Decorators in Python

Tue, 17 Mar 2026 00:00:00 +0000

Learn about higher order functions like map, filter, reduce and decorators

Iterators and Generators in Python - Complete Guide

Tue, 17 Mar 2026 00:00:00 +0000

Learn about iterables and iterators and generators in python

Itertools Module in Python - Complete Guide

Tue, 17 Mar 2026 00:00:00 +0000

Learn about the very useful itertools library in python

Practice Pandas on IPL Dataset

Tue, 17 Mar 2026 00:00:00 +0000

Master data analysis in Python using the pandas library using hands on practice on IPL dataset

Practice Pandas on Titanic Dataset

Tue, 17 Mar 2026 00:00:00 +0000

Master data analysis in Python using the pandas library using hands on practice on Titanic dataset

Practice Pandas on Zomato Dataset

Tue, 17 Mar 2026 00:00:00 +0000

Master data analysis in Python using the pandas library using hands on practice on Zomato dataset

Complete Python Programming Syllabus (Beginner to Advanced)

Tue, 30 Dec 2025 00:00:00 +0000

A structured Python programming roadmap from zero to professional level, covering fundamentals, core concepts, advanced topics, and real-world applications.