queuelib

What it is and what it does

Queuelib is a collection library that implements standard queue data structures—FIFO queues, LIFO stacks, priority queues, and round-robin queues—with the option to store them in memory or persist them to disk. Each collection type exposes a simple push/pop API and is designed for speed. The library has no external dependencies and supports modern Python versions from 3.10 onward.

It is typically used in scenarios where you need a durable work queue that survives process restarts, or where you want to manage items with priority or fair distribution across multiple sources. The disk-based variants allow you to queue large numbers of items without keeping them all in RAM, making it useful for batch processing, task scheduling, and buffering workloads.

Use it for:

• Persist task queues to disk in web scrapers or background job systems to survive restarts
• Implement priority-based work distribution where higher-priority tasks are processed first
• Fair-share scheduling across multiple data sources using round-robin dequeuing
• Buffer large datasets on disk when processing streams that exceed available memory
• Build durable message queues for offline-first or resilient data pipelines

Worth the install?

AI-flagged interpretation of the facts on this page — verify before relying

Queuelib provides in-memory and disk-persisted queue, stack, priority queue, and round-robin collection implementations with a simple API.

Yes. Queuelib is actively maintained, has no dependencies, supports current Python versions, carries no known vulnerabilities, and offers a straightforward solution for persistent and in-memory queuing. Install it if you need disk-backed queues or priority/round-robin scheduling; skip it if you require thread-safety or distributed queue semantics.

Install

queuelib on PyPI

pip install queuelib

uv add queuelib

poetry add queuelib

Installing queuelib

Before you install

Low friction: pure Python, no runtime dependencies, and actively maintained with recent releases. Supports Python 3.10 through 3.14 and PyPy.

License in practice

BSD-3-Clause permissive license allows use in commercial and proprietary projects with minimal restrictions.

Quickstart

pip install queuelib

from queuelib import FifoDiskQueue
q = FifoDiskQueue('queuefile')
q.push(b'item')
item = q.pop()
q.close()

Requires Python 3.10 or later. Collections are not thread-safe.

Verify before relying

• Whether disk-persisted queues survive process crashes or only graceful shutdown
• Performance characteristics at scale (queue size, throughput limits)
• Thread-safety workarounds or recommended patterns for concurrent access

Package facts

Evidence: queuelib-1.9.0-py3-none-any.whl

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