WeasyPrint is a visual rendering engine for HTML and CSS that can export to PDF. It aims to support web standards for printing. It is based on various libraries but not on a full rendering engine like WebKit or Gecko. The CSS layout engine is written in Python, designed for pagination, and meant to be easy to hack on.

WeasyPrint - Converts web documents (HTML with CSS, SVG) to PDF

Beautiful Soup is a Python HTML/XML parser designed for quick turnaround projects like screen-scraping. Beautiful Soup parses anything you give it, and does the tree traversal stuff for you. You can tell it "Find all the links", or "Find all the links of class externalLink", or "Find all the links whose urls match "foo.com", or "Find the table heading that's got bold text, then give me that text."
 <UL>
	<LI>It won't choke if you give it bad markup</LI>
	<LI>It provides Pythonic idioms for navigating, searching, and modifying a parse tree</LI>
	<LI>It Converts incoming documents to Unicode and outgoing documents to UTF-8.</LI>
 </UL>

Beautiful Soup is a Python HTML/XML parser designed for quick turnaround projects like screen-scraping. Beautiful Soup parses anything you give it, and does the tree traversal stuff for you. You can tell it "Find all the links", or "Find all the links of class externalLink", or "Find all the links whose urls match "foo.com", or "Find the table heading that's got bold text, then give me that text."

Beautiful Soup - Python HTML/XML parser

NumPy is the fundamental package needed for scientific computing with Python. Numerical Python adds a fast and sophisticated N-dimensional array facility to the Python language. NumPy can also be used as an efficient multi-dimensional container of generic data. Arbitrary data-types can be defined. This allows NumPy to seamlessly and speedily integrate with a wide variety of databases.

NumPy - fundamental package for scientific computing with Python

Whoosh is a fast, featureful full-text indexing and searching library implemented in pure Python. Programmers can use it to easily add search functionality to their applications and websites. It has support of Fielded indexing, search, scoring, text analysis, storage, Pluggable scoring algorithm, Powerful query language and spell-checker.

Whoosh - Python Search Library

Mechanize provides Stateful Programmatic Web Browser. It supports HTML form filling, Custom headers, HTTP authentication, SSL support etc. 
 GitHub: <A HREF="https://github.com/jjlee/mechanize" target="_blank">https://github.com/jjlee/mechanize</A>

Mechanize provides Stateful Programmatic Web Browser. It supports HTML form filling, Custom headers, HTTP authentication, SSL support etc.

Mechanize - Stateful Programmatic Web Browsing in Python

Mezzanine is a powerful, consistent, and flexible content management platform. Built using the Django framework. Mezzanine resembles tools such as Wordpress that provide an intuitive interface for managing pages, blog posts, form data, store products, and other types of content. But Mezzanine is also different. Unlike many other platforms that make extensive use of modules or reusable applications, Mezzanine provides most of its functionality by default. This approach yields a more integrated and efficient platform.

Mezzanine is a powerful, consistent, and flexible content management platform. Built using the Django framework. Mezzanine resembles tools such as Wordpress that provide an intuitive interface for managing pages, blog posts, form data, store products, and other types of content. But Mezzanine is also different. Unlike many other platforms that make extensive use of modules or reusable applications, Mezzanine provides most of its functionality by default. 

Mezzanine - CMS built using Django Framework

Theano is a Python library that allows you to define, optimize, and efficiently evaluate mathematical expressions involving multi-dimensional arrays. It is built on top of NumPy. Its features include tight integration with NumPy, transparent use of a GPU, dynamic C code generation and lot more.

Theano - Optimizing compiler for evaluating mathematical expressions on CPUs and GPUs.

The ultimate Python library in building OAuth and OpenID Connect servers. JWS, JWK, JWA, JWT are included. Authlib is compatible with Python2.7+ and Python3.6+.

Authlib - An ambitious authentication library for OAuth 1, OAuth 2, OpenID clients and servers.

This library provides simple API to generate RSS feeds.

PyRSS2Gen - Rss feed in Python

Haystack lets you write your search code once and choose the search engine you want it to run on. With a familiar API that should make any Djangonaut feel right at home and an architecture that allows you to swap things in and out as you need to, it's how search ought to be. It plays nicely with third-party app without needing to modify the source and supports Solr, Elasticsearch, Whoosh and Xapian.

Haystack - Modular search for Django

Flask is a micro framework for Python based on Werkzeug, Jinja 2 template engine. It is intended for getting started very quickly and was developed with best intentions in mind. It has built-in development server and debugger. It supports REST, secure cookies and lot more.

Flask - Python Microframework

wikidPad is a Wiki-like notebook for storing your thoughts, ideas, todo lists, contacts, or anything else you can think of to write down. It can cross link your information. It features  include auto-completion, outline views, incremental search, easy source code navigation. IDE's that provide these features can greatly increase developer productivity.

 wikidPad - Wiki-like notebook for storing your thoughts and ideas

Transport Layer Security (TLS) is a cryptographic protocol designed to provide communication security over the Internet. This is an open source Python implementation of TLS 1.2, using the Python Cryptographic Authority's (PyCA's) Cryptography libraries for all cryptographic primitives (e.g. AES, RSA, etc.). This project is part of PyCA's efforts to standardize and improve crypto libraries in Python.

TLS - Transport Layer Security protocol implementation in Python

lxml is a Pythonic binding for the libxml2 and libxslt libraries. It is unique in that it combines the speed and feature completeness of these libraries with the simplicity of a native Python API, mostly compatible but superior to the well-known ElementTree API.

lxml is a Pythonic binding for the libxml2 and libxslt libraries.

lxml-python

Sphinx is a tool that makes it easy to create intelligent and beautiful documentation for Python. It also supports C and C++. The support for other languages is in the plan. Support for multiple output formats are supported.
 <ul>
 <li>Output formats: HTML (including Windows HTML Help), LaTeX (for
 printable PDF versions), manual pages, plain text</li>
 <li>Extensive cross-references: semantic markup and automatic links
 for functions, classes, citations, glossary terms and similar pieces of
 information</li>
 <li>Hierarchical structure: easy definition of a document tree, with
 automatic links to siblings, parents and children</li>
 <li>Automatic indices: general index as well as a module index</li>
 <li>Code handling: automatic highlighting using the <a
 href="http://pygments.org" target="_blank">Pygments</a> highlighter</li>
 <li>Extensions: automatic testing of code snippets, inclusion of
 docstrings from Python modules (API docs), and more</li>
 </ul>

 Check out the list of sites using this product <A HREF="http://sphinx.pocoo.org/examples.html" target="_blank">http://sphinx.pocoo.org/examples.html</A>

Sphinx is a tool that makes it easy to create intelligent and beautiful documentation for Python. It also supports C and C++. The support for other languages is in the plan. Support for multiple output formats are supported.

Sphinx - Python Documentation Generator

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