llist
Linked list data structures for Python
Decision gist · record as of 2026-08-14
No, unless you have a specific performance requirement for linked list operations that you've benchmarked against alternatives. The high install friction (C compilation required), dormant maintenance status (last release 2021), and lack of recent updates create risk for modern Python environments. The performance advantage over collections.deque is unverified on current Python versions. Consider collections.deque first unless you have concrete evidence this package solves a real bottleneck.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires a C compiler and CPython development headers to build the extension during installation.
- High install friction: this is a C extension that requires compilation.
- The package is dormant (last release 2021-04-26, 1936 days ago) with no recent maintenance activity, though the repository remains active with occasional commits.
License · maintenance · safety
MIT (permissive) — MIT license is permissive, allowing commercial and private use with minimal restrictions—only requiring license and copyright notice preservation.
last release 2021-04-26 (1936 days) · last repo commit 2024-09-01 · 78 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 136,004 downloads/mo, #11,408 on PyPI
Alternatives
Verify before relying
pip install llist
from llist import dllist, sllist
dl = dllist([1, 2, 3])
sl = sllist([1, 2, 3])- Whether the package works reliably on modern Python versions (3.10+) given the long dormancy since 2021.
- Performance comparison with collections.deque on current Python versions to validate the claimed speed advantage.
- Compatibility with recent CPython releases and whether any breaking changes have occurred.
What it is and what it does
llist is a C extension module that implements linked list data structures—specifically doubly linked lists (dllist) and singly linked lists (sllist)—for CPython. It targets workloads where fast insertion and deletion in the middle of a sequence matter more than random access, offering potential speed advantages over collections.deque or standard Python lists for those specific operations.
The package has no runtime dependencies and is distributed under the MIT license. However, it requires compilation during installation, which means you need a C compiler and CPython development headers. The project is dormant: the last release was in 2021, though the repository remains on GitHub with occasional commits. This age raises questions about compatibility with modern Python versions and whether the performance claims still hold.
Use it for
- Implementing algorithms that frequently insert or remove elements from the middle of a sequence, such as certain graph or simulation workloads.
- Building data structures like queues or deques where you need efficient bidirectional traversal and modification.
- Performance-critical code where collections.deque is a bottleneck for middle-of-sequence operations.
- Educational purposes to understand linked list behavior and API design in CPython.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
No, unless you have a specific performance requirement for linked list operations that you've benchmarked against alternatives.
The high install friction (C compilation required), dormant maintenance status (last release 2021), and lack of recent updates create risk for modern Python environments. The performance advantage over collections.deque is unverified on current Python versions. Consider collections.deque first unless you have concrete evidence this package solves a real bottleneck.
Install
llist on PyPI
Before you install
High install friction: this is a C extension that requires compilation. The package is dormant (last release 2021-04-26, 1936 days ago) with no recent maintenance activity, though the repository remains active with occasional commits.
Requires a C compiler and CPython development headers to build the extension during installation.
License in practice
MIT license is permissive, allowing commercial and private use with minimal restrictions—only requiring license and copyright notice preservation.
Quickstart
pip install llist
from llist import dllist, sllist
dl = dllist([1, 2, 3])
sl = sllist([1, 2, 3])Verify before relying
- Whether the package works reliably on modern Python versions (3.10+) given the long dormancy since 2021.
- Performance comparison with collections.deque on current Python versions to validate the claimed speed advantage.
- Compatibility with recent CPython releases and whether any breaking changes have occurred.
Package facts
| License | MIT permissive |
| Python support | Not specified |
| Install friction | High. Source build required |
| Runtime dependencies | None |
| Maintenance | Dormant 1,936 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 136,004 / month, #11,408 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 3 - AlphaIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseOperating System :: MacOS :: MacOS XOperating System :: Microsoft :: WindowsOperating System :: POSIXProgramming Language :: CProgramming Language :: Python :: 2Programming Language :: Python :: 3Programming Language :: Python :: Implementation :: CPythonTopic :: Software Development :: Libraries :: Python Modules |
Evidence: llist-0.7.1.tar.gz
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