Most Python courses teach you syntax and stop. This one teaches you the *model*: what an object is, what a name binds to, why assignment never copies, what a closure captures, when a generator beats a list, and why most of the "gotchas" you have heard about are really consequences of four rules you can hold in your head.

Fifteen modules take you from running your first script and reading a traceback bottom-up, through types and operators, strings, lists, tuples, dictionaries and sets, control flow, functions, recursion, scope and closures, comprehensions and lazy iteration, exceptions — then files, JSON, the import system, classes, dataclasses and the standard library, testing and honest performance work. It closes with a capstone you would actually ship: a command-line task tracker with a proper package layout, JSON persistence, `argparse`, input validation and a test suite.

Every lesson runs real, correct Python and is paired with interactive visualisations: step through the bytecode pipeline from `.py` file to printed output, trace a program line by line with a live variable table, watch arguments bind across a call, unwind a recursive call stack, watch a generator suspend at a `yield`, and follow an exception up through four frames into one traceback.

**Who this is for:** absolute beginners who want one language taken seriously, students who have finished Coding Foundations, and anyone preparing for placements who needs to read and write idiomatic Python with confidence.

**What you need:** nothing. Python runs from a single installer, every example in the course is self-contained, and the interactive visualisations run in this page.

Courses for CSE students

Python Programming: From First Script to Packages, Classes and Testing