zope.lifecycleevent
Object life-cycle events
Decision gist · record as of 2026-08-14
Yes, if you are building a Zope-based or component-oriented system that uses zope.event for event dispatch. The package is stable, has no known vulnerabilities, and provides a standard event vocabulary that reduces coupling. No, if you are not already using zope.event or zope.interface—the package is tightly scoped to that ecosystem and offers little value outside it. Maintenance is aging but not abandoned; releases are infrequent but track current Python versions.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.9 or later.
- Intended for use within a zope.event-based system; standalone use outside that context is not typical.
- Low install friction with a pure-wheel distribution.
License · maintenance · safety
ZPL-2.1 (unclear) — Licensed under ZPL-2.1 (Zope Public License 2.1), which is OSI-approved but less common than MIT or Apache 2.0. Verify compatibility with your project's licensing requirements before adopting.
last release 2025-09-12 (336 days) · last repo commit 2025-09-12 · 3 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 165,725 downloads/mo, #10,518 on PyPI
Alternatives
Verify before relying
pip install zope.lifecycleevent
from zope.lifecycleevent import ObjectModifiedEvent
from zope.event import notify
notify(ObjectModifiedEvent(my_object))- Whether the 'aging' maintenance status reflects intentional stability or reduced active development.
- Specific use cases where this package is preferred over direct zope.event or zope.component integration.
What it is and what it does
zope.lifecycleevent provides a small set of event classes and convenience functions for notifying subscribers about object lifecycle changes—creation, modification, and removal—in systems built on the zope.event dispatch framework. It sits between zope.event (which provides generic event notification) and application code, offering a standard vocabulary for lifecycle events so that loosely-coupled components can react to object state changes without direct dependencies on one another.
The package is part of the Zope ecosystem and is typically used in component-based architectures where multiple subsystems need to be aware of object changes without tight coupling. It depends on zope.interface and zope.event, and is designed to have minimal external dependencies so that packages can rely on it without pulling in heavy frameworks. The library is stable (Production/Stable status), supports modern Python versions (3.9–3.13), and has been maintained since 2007.
Use it for
- Notify subscribers when an object is created, modified, or deleted in a component-based application.
- Implement audit logging or change tracking by subscribing to lifecycle events.
- Trigger side effects (e.g., cache invalidation, index updates) when objects change without hardcoding those side effects into business logic.
- Build plugin systems where third-party code reacts to lifecycle events without knowing about other subscribers.
- Integrate with zope.container or similar frameworks that rely on standard lifecycle event objects.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you are building a Zope-based or component-oriented system that uses zope.event for event dispatch.
The package is stable, has no known vulnerabilities, and provides a standard event vocabulary that reduces coupling. No, if you are not already using zope.event or zope.interface—the package is tightly scoped to that ecosystem and offers little value outside it. Maintenance is aging but not abandoned; releases are infrequent but track current Python versions.
Install
zope-lifecycleevent on PyPI
Before you install
Low install friction with a pure-wheel distribution. Maintenance status is aging—last release was 336 days ago—but the package is stable and actively supported for current Python versions (3.9–3.13).
Requires Python 3.9 or later. Intended for use within a zope.event-based system; standalone use outside that context is not typical.
License in practice
Licensed under ZPL-2.1 (Zope Public License 2.1), which is OSI-approved but less common than MIT or Apache 2.0. Verify compatibility with your project's licensing requirements before adopting.
Quickstart
pip install zope.lifecycleevent
from zope.lifecycleevent import ObjectModifiedEvent
from zope.event import notify
notify(ObjectModifiedEvent(my_object))Verify before relying
- Whether the 'aging' maintenance status reflects intentional stability or reduced active development.
- Specific use cases where this package is preferred over direct zope.event or zope.component integration.
Package facts
| License | ZPL-2.1 unclear |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 3 packagessetuptoolszope.interfacezope.event |
| Maintenance | Aging 336 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 165,725 / month, #10,518 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/StableIntended Audience :: DevelopersLicense :: OSI Approved :: Zope Public LicenseOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.9Programming Language :: Python :: Implementation :: CPythonProgramming Language :: Python :: Implementation :: PyPyTopic :: Internet :: WWW/HTTPTopic :: Software Development |
Evidence: zope_lifecycleevent-6.0-py3-none-any.whl
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See also pyeventsystem · zope.event · zope.processlifetime · zope.hookable · zope.annotation · zope.location · zope.container · zope.filerepresentation · zope.proxy · logging