z3c.pt
Fast ZPT engine.
Decision gist · record as of 2026-08-14
Yes, if you are building or maintaining a Zope 3 application and need faster template rendering than zope.pagetemplate. The package is stable (Production/Stable status), supports modern Python versions, has no known vulnerabilities, and low install friction. The aging maintenance status and unclear license treatment are minor concerns—review the ZPL terms for your use case and monitor the repository for future updates, but neither blocks adoption for existing Zope projects.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Low install friction with a pure-Python wheel.
- The package depends on 7 runtime dependencies including Chameleon and several Zope libraries.
- Maintenance status is aging—last release was 421 days ago, though the repository remains active and the package supports current Python versions (3.9–3.13).
License · maintenance · safety
ZPL (unclear) — Licensed under ZPL (Zope Public License), which is OSI-approved but less common than MIT or Apache 2.0. License treatment is marked unclear in the fact sheet, so you may want to review the actual license terms before use in proprietary or commercial contexts.
last release 2025-06-19 (421 days) · last repo commit 2025-10-30 · 1 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 128,229 downloads/mo, #11,716 on PyPI
Alternatives
Verify before relying
from z3c.pt.pagetemplate import PageTemplate
template = PageTemplate("""
<html>
<body tal:content="string:Hello World!">default</body>
</html>
""")
print(template())- Whether ZPL license is compatible with your project's licensing requirements
- Performance comparison with zope.pagetemplate or other template engines in your use case
- Maintenance roadmap and whether aging status indicates planned deprecation
What it is and what it does
z3c.pt is a template engine for Zope 3 applications that renders page templates (ZPT) by compiling them to bytecode via Chameleon. It provides the same application-level interface as zope.pagetemplate but with faster execution through bytecode compilation. The package supports TAL (Template Attribute Language) and TALES (Template Attribute Language Expression Syntax) for dynamic template logic, including path expressions, Python expressions, and custom namespace adapters.
The package offers two main template classes: PageTemplate for string-based templates and PageTemplateFile for templates loaded from disk. It also provides ViewPageTemplate and ViewPageTemplateFile variants for use within Zope view classes. Templates can bind to request and context objects, set content types, and support both keyword and positional arguments. It integrates with the Zope component architecture through zope.interface, zope.component, and zope.traversing.
Use it for
- Rendering HTML templates in Zope 3 web applications with TAL expressions and automatic bytecode compilation for performance.
- Building view templates that bind to Zope view objects and have access to request and context in a single property.
- Implementing custom TALES namespace adapters for domain-specific template functions and path traversal logic.
- Migrating from zope.pagetemplate to a faster engine without changing template syntax or application code.
- Serving dynamic content with content-type negotiation (HTML, XML, RDF) based on template or request headers.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you are building or maintaining a Zope 3 application and need faster template rendering than zope.pagetemplate.
The package is stable (Production/Stable status), supports modern Python versions, has no known vulnerabilities, and low install friction. The aging maintenance status and unclear license treatment are minor concerns—review the ZPL terms for your use case and monitor the repository for future updates, but neither blocks adoption for existing Zope projects.
Install
z3c-pt on PyPI
Before you install
Low install friction with a pure-Python wheel. The package depends on 7 runtime dependencies including Chameleon and several Zope libraries. Maintenance status is aging—last release was 421 days ago, though the repository remains active and the package supports current Python versions (3.9–3.13).
License in practice
Licensed under ZPL (Zope Public License), which is OSI-approved but less common than MIT or Apache 2.0. License treatment is marked unclear in the fact sheet, so you may want to review the actual license terms before use in proprietary or commercial contexts.
Quickstart
from z3c.pt.pagetemplate import PageTemplate
template = PageTemplate("""
<html>
<body tal:content="string:Hello World!">default</body>
</html>
""")
print(template())Verify before relying
- Whether ZPL license is compatible with your project's licensing requirements
- Performance comparison with zope.pagetemplate or other template engines in your use case
- Maintenance roadmap and whether aging status indicates planned deprecation
Package facts
| License | ZPL unclear |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 7 packagessetuptoolszope.interfacezope.componentzope.i18nzope.traversingzope.contentproviderChameleon |
| Maintenance | Aging 421 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 128,229 / month, #11,716 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 :: Web EnvironmentFramework :: Zope :: 3Intended Audience :: DevelopersLicense :: OSI Approved :: Zope Public LicenseNatural Language :: EnglishOperating System :: OS IndependentProgramming 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 :: Text Processing :: Markup :: HTMLTopic :: Text Processing :: Markup :: XML |
Evidence: z3c_pt-5.1-py3-none-any.whl
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See also Chameleon · zope.pagetemplate · zope.tales · zope.ptresource · zope.tal · zope.contentprovider · zope.browserpage · zope.browserresource · DocumentTemplate · zope.site