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WeasyPrint VS assertpy

Compare WeasyPrint VS assertpy and see what are their differences

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WeasyPrint logo WeasyPrint

WeasyPrint is a visual rendering engine for HTML and CSS that can export to PDF.

assertpy logo assertpy

A straightforward assertion library for Python.
  • WeasyPrint Landing page
    Landing page //
    2023-10-09
  • assertpy Landing page
    Landing page //
    2022-11-06

WeasyPrint features and specs

  • Ease of Use
    WeasyPrint is designed to be simple and user-friendly, making it easy for developers to generate PDF documents from HTML and CSS without complex configurations.
  • CSS Support
    It supports modern CSS standards, allowing developers to style their documents in a way that closely mirrors how they would style web pages.
  • Quality Output
    WeasyPrint produces high-quality PDFs with precise layout and text rendering, suitable for professional use.
  • Open Source
    Being an open-source tool, WeasyPrint is free to use and has a community that contributes to its continuous development and improvement.
  • Python Integration
    WeasyPrint is written in Python and integrates seamlessly with Python applications, making it suitable for Python developers.

Possible disadvantages of WeasyPrint

  • Performance
    WeasyPrint can be slower compared to some other PDF generation tools, particularly with large or complex documents.
  • Limited JavaScript Support
    It lacks full JavaScript execution support, meaning dynamic content generation via JavaScript is not possible.
  • Dependencies
    WeasyPrint requires several system dependencies, which might complicate installation and deployment.
  • Feature Gaps
    Certain advanced PDF features, such as forms or annotations, may not be fully supported by WeasyPrint.
  • Community and Support
    While active, the community is smaller compared to some commercial solutions, which may affect the availability of support resources.

assertpy features and specs

  • Fluent API
    Assertpy offers a fluent API that makes assertions more readable and expressive, enabling developers to write assertions in a natural language style that is easy to understand.
  • Chainable Assertions
    It allows for chainable assertions, enabling multiple checks to be performed in a single line of code, thereby reducing verbosity and enhancing clarity.
  • Comprehensive Assertion Methods
    The library provides a wide range of built-in assertion methods, catering to various types of data validations, such as checking for size, type, value, and more.
  • Extensibility
    Assertpy supports extending its functionality by defining custom assertions, allowing developers to tailor it to their specific needs.
  • Pythonic
    Designed with Pythonic principles in mind, Assertpy fits seamlessly into Python projects, enabling idiomatic and consistent code style.

Possible disadvantages of assertpy

  • Learning Curve
    Developers new to the library may encounter a learning curve due to the distinct approach of using fluent and chainable assertions as opposed to traditional methods.
  • Limited by Python Version
    The library may have limitations in terms of compatibility with older versions of Python, requiring users to ensure their environment is up-to-date.
  • Performance Overhead
    The additional abstraction layer introduced by a fluent interface might introduce some performance overhead, especially in performance-critical or resource-constrained environments.
  • Less Community Support
    Compared to more established testing libraries, Assertpy might have less community support and fewer resources available for resolving issues or getting help.
  • Dependency Management
    Using a third-party library introduces additional dependencies to manage, which could complicate project maintenance and compatibility.

Analysis of assertpy

Overall verdict

  • assertpy is a well-regarded, lightweight assertion library for Python that provides a fluent, chainable API for writing readable and expressive test assertions, making it a solid choice for improving test clarity.

Why this product is good

  • Offers a fluent, chainable assertion syntax that makes tests more readable and self-documenting
  • Comprehensive built-in assertions for strings, numbers, lists, dicts, files, dates, and more
  • Produces clear, descriptive failure messages that speed up debugging
  • Lightweight with minimal dependencies and easy to integrate into existing test suites
  • Framework-agnostic, working seamlessly with pytest, unittest, and other test runners
  • Actively maintained open-source project with good documentation and community support

Recommended for

  • Python developers who want more readable and expressive test assertions
  • Teams using pytest or unittest looking to enhance assertion clarity
  • Projects that value descriptive failure messages for faster debugging
  • Developers coming from fluent assertion libraries in other languages (like AssertJ or Chai)
  • QA engineers and testers writing maintainable, self-documenting test code

Category Popularity

0-100% (relative to WeasyPrint and assertpy)
HTML To PDF
100 100%
0% 0
Testing
0 0%
100% 100
PDF Tools
100 100%
0% 0
Python
0 0%
100% 100

User comments

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Social recommendations and mentions

Based on our record, WeasyPrint seems to be more popular. It has been mentiond 38 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

WeasyPrint mentions (38)

  • Render an HTML Table to PNG in Python (5 Ways, 2026)
    WeasyPrint comes up in every "HTML to image" search, so it's worth being precise: it's an excellent, actively-maintained pure-Python engine โ€” but it renders to PDF only (PNG export was removed in v53) and runs no JavaScript. If your table is static HTML/CSS and you actually want a PDF, WeasyPrint is a great, dependency-light choice and you don't need any of the above. If you need a PNG, or your table/chart is... - Source: dev.to / 2 months ago
  • Ask HN: What is nowadays (opensource) way of converting HTML to PDF?
    Just print to PDF in a browser, or automate that using a browser automation tool. For a non-browser-based open source solution, WeasyPrint. https://weasyprint.org/ For a proprietary solution, try Prince XML: https://www.princexml.com/. - Source: Hacker News / 11 months ago
  • Show HN: PlutoPrint โ€“ Generate Beautiful PDFs and PNGs from HTML with Python
    How does it differ from https://weasyprint.org ? - Source: Hacker News / about 1 year ago
  • Lyon Drops Microsoft to Boost Digital Sovereignty
    You can learn more about weasyprint on their website (https://weasyprint.org/ ). It's an open source Python package that can be launched using cli or from Python code. - Source: Hacker News / about 1 year ago
  • Show HN: PlutoBook โ€“ Fast, lightweight C++ library for generating PDF from HTML
    This is interesting. So it's HTML -> PDF without using Chrome/Puppeteer etc.? Is that correct. It reminds me of https://weasyprint.org/ Weasyprint (by their own admission) have really struggled with a lot of bugs, which isn't surprising if you're allowing arbitrary HTML input - how are you getting on with that? - Source: Hacker News / about 1 year ago
View more

assertpy mentions (0)

We have not tracked any mentions of assertpy yet. Tracking of assertpy recommendations started around Mar 2021.

What are some alternatives?

When comparing WeasyPrint and assertpy, you can also consider the following products

wkhtmltopdf - wkhtmltopdf is an open source (LGPL) command line tools to render HTML into PDF and various image...

grappa - grappa is an declarative, verbose, and expressive assertion library for Python.

DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more

PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request

HTML2PDF.fr - HTML2PDF is a HTML to PDF converter that allows the conversion of valid HTML 4.

PDFCrowd - Pdfcrowd is a Web/HTML to PDF online service. Convert HTML to PDF online in the browser or in your PHP, Python, Ruby, .NET, Java apps via the REST API.