PyCon US (@pycon.us)

Delve into #Python's iteration mechanics! Check out this sneak peak of Rodrigo Girão Serrão's #PyConUS 2025 tutorial "Reimplementing the module itertools for fun and profit" on May 15th 🐍 Register for this tutorial and more via your PyCon US account dashboard!

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PyCon US 2025 Tutorial Sneak Peek: "Reimplement `itertools` for fun & profit" Rodrigo Girão Serrão Full Tutorial Title: Reimplementing the module `itertools` for fun and profit You know how to use a `for` loop in Python. But do you know HOW it works Do you know why it is that you can write `for` loops with `range`, `lists`, `strings`, `zip`, and `enumerate`? What's the machinery that makes that work? And have you noticed how `range(1)` and `range(99999999999999999)` take exactly the same time to run? There's something lazy about the built-in `range`... But what does “lazy” even mean? In the tutorial “Reimplementing the module `itertools` for fun and profit” you'll learn how to answer all of these questions, and much more, through the lens of the module `itertools`. The module `itertools` is implemented in C, but in this tutorial you'll reimplement it in pure Python! And you'll do that for two reasons. First, because it's an excellent, fun challenge...And on top of that, because it's surprisingly... https://youtu.be/xumSsPlhB2o