trivial-do

snakes

Python-like generators for Common Lisp

gmap

The GMap iteration macro, plus a few other useful macros.

Khazern

A portable and extensible Common Lisp LOOP implementation

picl

PICL is a Common Lisp library that provides a comprehensive port of Python's itertools module, offering iterator utilities for sequence manipulation and combinatorial operations. It implements lazy evaluation where appropriate and avoids dependencies on cl-cont for better compatibility with Common Lisp's condition system. ## Key Features - **Complete itertools port** — Implements nearly all functions from Python's itertools library in Common Lisp. - **Lazy evaluation** — Many iterators are lazy, producing values on demand rather than all at once. - **cl-cont independence** — Designed without reliance on cl-cont, ensuring better compatibility with Common Lisp's condition system. - **Iterator protocol** — Defines a simple iterator protocol using thunks that return payload and alive-indicator values. - **Iterate integration** — Provides an `in-it` driver for seamless use with the Iterate iteration macro. - **Predefined specializations** — Includes built-in `make-iterator` methods for lists and vectors. ## Philosophy PICL aims to bring Python's powerful itertools functionality to Common Lisp while maintaining idiomatic Lisp design and avoiding problematic dependencies.