Introduction

Python Collect is a fluent collection pipeline for Python, modeled after collect.js (itself a port of Laravel’s Collection). It wraps a list or dict and gives you chainable, expressive methods for transforming, filtering, and aggregating data instead of writing loops and comprehensions by hand.

from python_collect import collect

result = (
    collect([1, 2, 3, 4, 5, 6])
    .filter(lambda n, i: n % 2 == 0)
    .map(lambda n, i: n * n)
    .sum()
)
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Why Python Collect?

Loops and list comprehensions get hard to read once you’re chaining more than one or two operations. Python Collect lets each step read top to bottom, named for what it does, instead of nesting for loops or stacking comprehensions.

Features

• Over 100 chainable methods covering filtering, mapping, grouping, sorting, and aggregation
• Works with both list and dict data, passing indices or keys to your callbacks automatically
• Returns a new Collection by default; a handful of explicit methods (push, put, pop, …) mutate in place
• Extendable with your own methods via Collection.macro()
• Zero runtime dependencies, Python 3.13+