Course

Python Zero to Hero
with Data Structures & Algorithms

Twenty-four modules, six phases, five lessons in each. Every code sample on every page has a Run button and executes in your browser — there is no Python to install, no virtual environment to get wrong, and nothing to configure before your first line runs. Open a lesson on a phone on the bus and the code still runs.

Start Phase 1 free See plans from ₹499

The six phases

A lesson is a thing you finish, so the course is measured in lessons rather than weeks — there is no calendar to fall behind.

Phase 1 — Foundations Free

Modules 1–4. Variables and types, operators, strings, conditionals and loops, lists and tuples, dictionaries and sets, functions. Free with an account, in full — not a preview.

Phase 2 — Intermediate Python

Modules 5–8. Object-oriented programming, modules and packages, file I/O and error handling, comprehensions, generators and decorators.

Phase 3 — DSA Foundations

Modules 9–12. Complexity analysis and Big O, array and string problems, linked lists, stacks and queues with recursion.

Phase 4 — DSA Core

Modules 13–16. Trees, graphs, hashing, sorting and searching algorithms.

Phase 5 — DSA Advanced

Modules 17–20. Dynamic programming, greedy algorithms, backtracking, advanced graph algorithms.

Phase 6 — Expert

Modules 21–24. Concurrency, testing with pytest, packaging, design patterns, performance, and a capstone project.

All 24 modules, phase by phase

Read the entire syllabus before signing up for anything. Phase 1 — four modules, twenty lessons — is free in full once you have an account, and every code sample in it runs in your browser with nothing to install.

Phase 1 — Foundations Free

Variables and types, operators, strings, conditionals, loops, lists and tuples, dictionaries and sets, functions.

Module 1 First Contact — Values, Operators, Strings & Decisions Free — start now Module 2 Collections & Repetition — Lists, Tuples & Loops Free — start now Module 3 Dictionaries, Sets & Functions Free — start now Module 4 Files, Errors & a First Look at OOP Free — start now

Phase 2 — Intermediate Python

Object-oriented programming, modules and packages, file I/O and error handling, comprehensions, generators and decorators.

Module 5 OOP Deep Dive — Inheritance & Special Methods Subscribers
Module 6 Modules, Packages & the Python Ecosystem Subscribers
Module 7 Comprehensions, Generators & Decorators Subscribers
Module 8 Regex & Testing with pytest-style Tests Subscribers

Phase 3 — DSA Foundations

Complexity analysis, array and string problems, linked lists, stacks and queues with recursion.

Module 9 Complexity Analysis — Big-O Subscribers
Module 10 Arrays & Strings — Core Interview Patterns Subscribers
Module 11 Linked Lists — Your First Real Data Structure Subscribers
Module 12 Stacks, Queues & Recursion Subscribers

Phase 4 — DSA Core

Trees, graphs, hashing, sorting and searching algorithms.

Module 13 Trees Subscribers
Module 14 Graphs Subscribers
Module 15 Hashing, Sets & Counting Subscribers
Module 16 Sorting, Searching & Heaps Subscribers

Phase 5 — DSA Advanced

Dynamic programming, greedy algorithms, backtracking, advanced graph algorithms.

Module 17 Dynamic Programming Subscribers
Module 18 Greedy Algorithms Subscribers
Module 19 Backtracking Subscribers
Module 20 Advanced Graph Algorithms Subscribers

Phase 6 — Expert

Concurrency, testing with pytest, packaging, design patterns, performance and a capstone.

Module 21 Concurrency & Async Subscribers
Module 22 Testing & Quality with pytest Subscribers
Module 23 Packaging, Tooling & Design Patterns Subscribers
Module 24 Performance, and the Final Capstone Subscribers

Start Phase 1 free Unlock Phases 2–6 from ₹499

Why the code runs in the browser

Most people who quit a programming course quit during setup, before they have written anything. Here the Python interpreter is compiled to WebAssembly and loads with the page, so every example is editable and runnable where you are reading it. Change a line, press Run, see what breaks — which is how the material is meant to be used. Two honest limits: because it runs inside the browser tab there are no real operating-system threads and no pip install, so the few lessons that need those say so and show you how to run them on your own machine instead.

If you are preparing for interviews

Phases 3 to 5 are the interview material — complexity analysis, the classic data structures, then dynamic programming, greedy and backtracking. The value of doing them here rather than grinding a problem list is that each pattern is explained before you are asked to apply it, so you learn why a solution works rather than memorising that it does.

What it costs

Phase 1 is free with an account. One subscription then unlocks Phases 2–6 and the whole GenAI Testing course: ₹499 for a month, ₹1,199 for three months, ₹3,999 for a year. Nothing renews automatically. Full pricing.