Python 3.12

Built-in functions and methods, with a live in-browser demo where the semantics fit. No install, no waiting for a REPL to boot.

224 functions185 live demos
Sections
Functions & methods LIVE
Built-ins, string/list/dict/set methods, file objects.
224 entries →
Operators LIVE
Arithmetic, comparison, logical, bitwise, walrus.
32 entries →
Errors & exceptions LIVE
TypeError, ValueError, KeyError, and the full hierarchy.
45 entries →
Keywords LIVE
if, for/else, try/finally, with, yield, match/case — every syntax form.
24 entries →
Standard library LIVE
os, json, datetime, re, and the modules devs actually reach for.
21 modules →
Browse by type
Jump straight to the methods for a specific built-in type.
builtin70list11bytearray8bytes35str47complex1dict11float5int7memoryview6range2set17slice1tuple2type1
Featured — try the live demos
01str.replaceLIVE02str.splitLIVE03sortedLIVE04%LIVE05andLIVE06dict.getLIVE
Tools
JSON, Base64, JWT, and more →
Client-side developer utilities — formatters, encoders, minifiers. Everything runs in your browser.
SQL
SQL reference →
Queries, clauses and functions for working with relational data.