rel
Registered Event Listener. Provides standard (pyevent) interface and functionality without external dependencies
Decision gist · record as of 2026-08-14
Yes, if you need a lightweight, dependency-free event dispatcher for network applications and are comfortable with its callback-based interface. The permissive MIT license, zero runtime dependencies, and active maintenance make it low-risk. However, verify first whether its API and performance characteristics match your use case—asyncio or other modern frameworks may be more suitable for new projects.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Low install friction with no runtime dependencies.
- Active maintenance status with a recent release.
License · maintenance · safety
MIT License (permissive) — MIT License permits commercial and private use with minimal restrictions; suitable for most projects.
last release 2026-07-05 (40 days)
0 known vulnerabilities (OSV.dev, 2026-08-14) · 139,041 downloads/mo, #11,312 on PyPI
Alternatives
Verify before relying
pip install rel
import rel
rel.initialize(['epoll', 'kqueue', 'poll', 'select'])
# Use rel's event handling in your network application- Whether the package supports modern async/await syntax or is limited to callback-based patterns
- Performance characteristics compared to asyncio or other event loop implementations
- Current user base and adoption rate beyond download statistics
What it is and what it does
rel provides a unified interface for asynchronous event handling across different operating systems by abstracting over platform-specific notification mechanisms. It attempts to use the most efficient method available on your system—epoll on Linux, kqueue on BSD/macOS, poll or select as fallbacks—without requiring external C dependencies. The library is designed primarily for network applications that need to handle multiple concurrent connections or events.
You initialize rel with your preferred methods in order of preference, and it automatically selects the first available one. If you don't call initialize(), it tries the default sequence. This makes it useful for developers building network servers or event-driven applications who want portability without the overhead of larger frameworks.
Use it for
- Building network servers that handle many concurrent connections across Linux, BSD, and macOS
- Creating event-driven applications that need to react to I/O readiness without external dependencies
- Porting existing pyevent-based code to a dependency-free alternative
- Implementing custom event loops for specialized networking tasks
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need a lightweight, dependency-free event dispatcher for network applications and are comfortable with its callback-based interface.
The permissive MIT license, zero runtime dependencies, and active maintenance make it low-risk. However, verify first whether its API and performance characteristics match your use case—asyncio or other modern frameworks may be more suitable for new projects.
Install
rel on PyPI
Before you install
Low install friction with no runtime dependencies. Active maintenance status with a recent release.
License in practice
MIT License permits commercial and private use with minimal restrictions; suitable for most projects.
Quickstart
pip install rel
import rel
rel.initialize(['epoll', 'kqueue', 'poll', 'select'])
# Use rel's event handling in your network applicationVerify before relying
- Whether the package supports modern async/await syntax or is limited to callback-based patterns
- Performance characteristics compared to asyncio or other event loop implementations
- Current user base and adoption rate beyond download statistics
Package facts
| License | MIT License permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 40 days since the last release |
| First released | |
| Downloads | 139,041 / month, #11,312 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableEnvironment :: ConsoleIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: PythonTopic :: Software Development :: Libraries :: Python Modules |
Evidence: rel-0.4.9.27-py3-none-any.whl
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