#python

1 week ago 32

Python Programming

Working with Text and Data in Python: Regex, JSON, and CSV

Lesson 11: turn messy text into structured data: a practical regex core, JSON round trips, CSV with DictReader, and a complete validate-and-transform pipeline from CSV to clean JSON.

1 week ago 67

Python Programming

Python Data Structures: Lists, Tuples, Sets, Dicts, and Comprehensions

Lesson 5: lists, tuples, sets, and dictionaries, how to choose between them, and the comprehensions, enumerate, and zip idioms that make Python feel like Python, with a word-counter project.

1 week ago 61

Python Programming

Object-Oriented Python: Classes, Inheritance, and Dataclasses

Lesson 6: object-oriented Python without the fear: classes, __init__ and self, dunder methods, inheritance versus composition, and modern dataclasses, with an inventory project in the playground.

1 week ago 43

Python Programming

Python Exceptions and File Handling: Code That Survives Bad Input

Lesson 7: write Python that survives bad input: tracebacks, try/except done right, raising custom exceptions, and safe file reading and writing with the with statement, practiced on messy data.

1 week ago 42

Python Programming

Python Modules, Packages, and a Standard Library Tour

Lesson 8: imports demystified, your own modules and packages, pip and virtual environments, then a working tour of math, random, datetime, Counter, defaultdict, and pathlib, ending in a file organizer project.

1 week ago 34

Python Programming

Python Iterators and Generators: Lazy Evaluation Done Right

Lesson 9: the machinery behind every for loop, then generators with yield, lazy generator expressions, infinite sequences, and constant-memory data pipelines, finished with a log analyzer project.

1 week ago 28

Python Programming

Python Type Hints for Beginners: Code That Explains Itself

Lesson 10: make Python explain itself with type hints: annotations, typed collections, unions with None, type aliases, and a type checker that finds bugs before you run anything.

1 week ago 39

Python AI

Machine Learning Foundations in Python: First Models with scikit-learn

Lesson 14: train your first real machine learning models with scikit-learn: features and labels, train/test splits, fit/predict/score, a decision tree you can read, k-nearest-neighbors, and overfitting, live in the browser.

1 week ago 70

Python AI

A Practical Introduction to LLMs and RAG in Python, and Where to Go Next

The finale: LLMs explained with the concepts you already own, tokens and prompts, your first Claude API call from Python, a toy RAG engine in the browser, and the full map into the production LLM and MCP series.

1 week ago 45

Python AI

Deep Learning Basics in Python: Neural Networks with TensorFlow and Keras

Lesson 15: deep learning without hand-waving: what neurons compute, loss and gradient descent, backpropagation built by hand in NumPy in the browser, and a complete Keras Fashion MNIST classifier with dropout and transfer learning.