filelock

A platform independent file lock.

filelock Permissive license MIT Active ★ 975 v3.32.3 released 2026-08-13

Install

filelock on PyPI

pip

pip install filelock

uv

uv add filelock

poetry

poetry add filelock

Package facts

License	MIT (permissive)
Python support	supports the current Python release (>=3.10)
Install friction	low — pure-Python wheel
Runtime dependencies	none
Maintenance	actively maintained — 0 days since the last release
Last repo commit	2026-08-13
First released	2014-07-06
Popularity	one of the 100 most-downloaded packages on PyPI (30-day window, as of 2026-08-13)
Known vulnerabilities	none known (OSV.dev, checked 2026-08-13)

Evidence: filelock-3.32.3-py3-none-any.whl

Keywords: application, cache, directory, log, user

Development Status :: 5 - Production/StableIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: 3.15Topic :: InternetTopic :: Software Development :: LibrariesTopic :: System

About filelock

from the package's own PyPI description — quoted content, verbatim

filelock

PyPI (image) Supported Python versions (image) Documentation status (image) Downloads (image) check (image)

For more information checkout the official documentation.

Read as markdown · JSON record · Source repository · Homepage · Docs

AI interpretation — verify before relying

AI-generated interpretation of the package facts above; every digit, version, license, or vulnerability id it cites is grounded in the facts already shown on this page

filelock provides a platform-independent file locking mechanism for coordinating access to files across multiple processes or threads.

Active maintenance with recent releases; zero runtime dependencies and a pure-Python wheel keep installation friction minimal.

MIT license permits unrestricted use, modification, and distribution in both open and closed-source projects.

Usage

pip install filelock==3.32.3

from filelock import FileLock

with FileLock('myfile.lock'):
    # Critical section protected by lock
    pass

Requires Python 3.10 or later.

Verdict: filelock is a stable, actively maintained top-100 PyPI package with no known vulnerabilities, zero dependencies, and permissive MIT licensing. It is production-ready for any application needing cross-platform file locking.

file lockingcross-platform file lockprocess synchronizationconcurrent file accessmutex file lockdirectory lockapplication lock