Python's Built-in Functions
The 25 built-ins worth memorizing, in tiers, and the 46 others you can look up as needed.
The long version: Built-in Functions in Python
Printable Python cheat sheets
Reference sheets, one printable page each. Each one distills an article I wrote into the version you can pin above your desk.
Free with a Python Morsels account. The article is the long version; the sheet is the part you keep looking up.
Sized for US Letter; prints fine on A4.
Python's pathlib Module
The anatomy of a Path, then reading, writing, finding, moving, and deleting files.
The long version: Python's pathlib module
Python Big O
What each list, dict, set, deque, and heap operation costs, and the curves those costs sit on.
The long version: Python Big O: the time complexities of different data structures in Python
The Python REPL
The keyboard shortcuts and modes of the Python 3.13+ REPL, with a diagram of how far each edit reaches.
The long version: Python REPL Shortcuts & Features
More sheets are coming, one at a time.
If there's a Python topic you keep looking up and wish fit on one page, tell me at
[email protected].