pyeventsystem
An event driven middleware library for Python
Decision gist · record as of 2026-08-14
No. While the library is simple to install and has no dependencies, it is abandoned (last updated 2019-02-18) and targets obsolete Python versions (2.7, 3.6). For new projects, use a maintained alternative or a framework's built-in event system. Only consider it if you are maintaining legacy code that already depends on it.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Package targets Python 2.7 and 3.6; compatibility with modern Python versions is unverified.
- Installation is frictionless with no runtime dependencies, but the package is abandoned—last release was 2019-02-18 with no updates since.
- It targets Python 2.7 and 3.6, which are now out of support.
License · maintenance · safety
MIT (permissive) — MIT license is permissive and imposes no significant restrictions on use, modification, or distribution.
last release 2019-02-18 (2734 days) · last repo commit 2019-02-18 · 1 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 107,405 downloads/mo, #12,615 on PyPI
Alternatives
Verify before relying
from pyeventsystem.middleware import SimpleMiddlewareManager, dispatch, observe
class MyMiddleware:
def __init__(self, event_dispatcher):
self.events = event_dispatcher
@dispatch("event.name", priority=2500)
def handler(self, arg):
return "result"
manager = SimpleMiddlewareManager()
obj = MyMiddleware(manager.events)
manager.add(obj)
obj.handler("value")- Whether the package works reliably on Python 3.7 and later versions despite targeting only 3.6.
- Whether the event system scales to production workloads or is intended for small-scale use.
- Whether wildcard event patterns (e.g., '*.unfortunate.events') support all expected glob semantics.
What it is and what it does
pyeventsystem is a lightweight event-driven middleware library that lets you build systems around event subscription and function interception. It uses decorators to mark functions as event dispatchers or observers, and groups them into middleware classes for organized management. The core idea is that you can hook into function execution at multiple points—before, after, or replacing the call entirely—using a priority-based system to control execution order.
The library is designed for scenarios where you want middleware-style behavior without a full framework. You define event names using dot notation, attach handlers with priorities, and the system routes events through them in order. However, the package has been abandoned since 2019-02-18 and targets outdated Python versions, so it carries maintenance risk for new projects.
Use it for
- Building plugin systems where middleware classes can be registered and executed in a defined order around core functions.
- Implementing logging or monitoring that wraps function calls without modifying the original code.
- Creating pre- and post-processing pipelines for data transformation or validation.
- Intercepting function calls to add cross-cutting concerns like authentication or error handling.
- Organizing event handlers into reusable middleware classes for complex applications.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
No.
While the library is simple to install and has no dependencies, it is abandoned (last updated 2019-02-18) and targets obsolete Python versions (2.7, 3.6). For new projects, use a maintained alternative or a framework's built-in event system. Only consider it if you are maintaining legacy code that already depends on it.
Install
pyeventsystem on PyPI
Before you install
Installation is frictionless with no runtime dependencies, but the package is abandoned—last release was 2019-02-18 with no updates since. It targets Python 2.7 and 3.6, which are now out of support.
Package targets Python 2.7 and 3.6; compatibility with modern Python versions is unverified.
License in practice
MIT license is permissive and imposes no significant restrictions on use, modification, or distribution.
Quickstart
from pyeventsystem.middleware import SimpleMiddlewareManager, dispatch, observe
class MyMiddleware:
def __init__(self, event_dispatcher):
self.events = event_dispatcher
@dispatch("event.name", priority=2500)
def handler(self, arg):
return "result"
manager = SimpleMiddlewareManager()
obj = MyMiddleware(manager.events)
manager.add(obj)
obj.handler("value")Verify before relying
- Whether the package works reliably on Python 3.7 and later versions despite targeting only 3.6.
- Whether the event system scales to production workloads or is intended for small-scale use.
- Whether wildcard event patterns (e.g., '*.unfortunate.events') support all expected glob semantics.
Package facts
| License | MIT permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Abandoned 2,734 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 107,405 / month, #12,615 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 2 - Pre-AlphaIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: Python :: 2.7Programming Language :: Python :: 3Programming Language :: Python :: 3.6Programming Language :: Python :: Implementation :: CPythonProgramming Language :: Python :: Implementation :: PyPyTopic :: Software Development :: Libraries :: Python Modules |
Evidence: pyeventsystem-0.1.0-py2.py3-none-any.whl
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