meld3

What it is and what it does

meld3 is a templating library that uses ElementTree to parse and manipulate HTML or XML documents. Templates are marked up with namespace-qualified identifiers (meld:id attributes), and Python code then locates and modifies those elements by name, adding content, attributes, or repeating sections over data. The library outputs well-formed HTML, XHTML, or XML depending on the write method used.

The package was created as a variation of earlier templating systems (Meld2 and PyMeld) and was maintained primarily as a dependency of Supervisor until version 4.1.0 (October 2019). Since then, no further development has been planned, and the package is considered unmaintained. It has received only minimal updates since 2007 to keep compatible with newer Python versions.

Use it for:

• Generating dynamic HTML documents from templates in legacy systems that depend on meld3 (e.g., older Supervisor versions).
• Transforming XML documents by locating elements via meld:id identifiers and modifying their content or attributes programmatically.
• Repeating template sections (like table rows) over collections of data using the repeat() method.
• Outputting templates in different formats (HTML 4.01, XHTML, or XML) from a single parsed tree.

Worth the install?

AI-flagged interpretation of the facts on this page — verify before relying

meld3 is an HTML/XML templating system that separates template markup from rendering logic using ElementTree-based element manipulation and namespace-qualified identifiers.

No. The package is explicitly unmaintained as of April 2020 and archived. Install only if you are maintaining legacy code that already depends on it (e.g., Supervisor versions before 4.1.0). For new projects, use a modern templating library such as Jinja2 or similar. No known security vulnerabilities are recorded, but lack of maintenance means future issues will not be addressed.

Install

meld3 on PyPI

pip install meld3

uv add meld3

poetry add meld3

Installing meld3

Before you install

Installation is straightforward with no runtime dependencies, but the package is explicitly unmaintained as of April 2020 and has received only minimal updates since 2007 to maintain Python compatibility. The repository is archived.

License in practice

Licensed under a BSD-derived license (permissive), which allows commercial and private use with minimal restrictions, though the exact terms should be verified at the stated license URL.

Quickstart

from meld3 import parse_xmlstring
root = parse_xmlstring(xml_string)
root.findmeld('element_id').content('new content')
root.write_xml(sys.stdout)

Requires Python 2.7 or later on Python 2, or Python 3.4 or later on Python 3; input must be well-formed XML for parse_xmlstring or HTML for parse_htmlstring.

Verify before relying

• Whether meld3 works reliably with modern Python versions beyond 3.8 (last tested version in classifiers).
• Current state of compatibility with contemporary web frameworks or whether it is used only in legacy systems.
• Security implications of using an unmaintained package in production environments.

Package facts

Evidence: meld3-2.0.1-py2.py3-none-any.whl

Tags

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