prompt_toolkit is a library for building powerful interactive command lines and terminal applications in Python. ptpython is an interactive Python Shell, build on top of prompt_toolkit. prompt_toolkit could be a replacement for GNU readline, but it can be much more than that.
<ul>
<li>Pure Python.</li>
<li>Syntax highlighting of the input while typing. (For instance, with a Pygments lexer.)</li>
<li>Multi-line input editing.</li>
<li>Advanced code completion.</li>
<li>Both Emacs and Vi key bindings. (Similar to readline.)</li>
<li>Even some advanced Vi functionality, like named registers and digraphs.</li>
<li>Reverse and forward incremental search.</li>
<li>Runs on all Python versions from 2.6 up to 3.5.</li>
<li>Works well with Unicode double width characters. (Chinese input.)</li>
<li>Selecting text for copy/paste. (Both Emacs and Vi style.)</li>
<li>Support for <a href="https://cirw.in/blog/bracketed-paste" rel="nofollow">bracketed paste</a>.</li>
<li>Mouse support for cursor positioning and scrolling.</li>
<li>Auto suggestions. (Like <a href="http://fishshell.com/" rel="nofollow">fish shell</a>.)</li>
<li>Multiple input buffers.</li>
<li>No global state.</li>
<li>Lightweight, the only dependencies are Pygments, six and wcwidth.</li>
</ul>

prompt_toolkit is a library for building powerful interactive command lines and terminal applications in Python. ptpython is an interactive Python Shell, build on top of prompt_toolkit. prompt_toolkit could be a replacement for GNU readline, but it can be much more than that.

Python Prompt Toolkit - Library for building powerful interactive command lines in Python

Bokeh is an interactive visualization library for modern web browsers. It provides elegant, concise construction of versatile graphics, and affords high-performance interactivity over large or streaming datasets. Bokeh can help anyone who would like to quickly and easily make interactive plots, dashboards, and data applications.
 
It works in Python close to all the PyData tools you are already familiar with. Plots, dashboards, and apps can be published in web pages or Jupyter notebooks.

Bokeh is an interactive visualization library for modern web browsers. It provides elegant, concise construction of versatile graphics, and affords high-performance interactivity over large or streaming datasets. Bokeh can help anyone who would like to quickly and easily make interactive plots, dashboards, and data applications.

Bokeh -  Interactive Data Visualization in the browser, from Python

Altair is a declarative statistical visualization library for Python, based on <a href="http://vega.github.io/vega" target="_blank">Vega</a> and <a href="http://vega.github.io/vega-lite" target="_blank">Vega-Lite</a>. Altair’s API is simple, friendly and consistent and built on top of the powerful Vega-Lite visualization grammar. This elegant simplicity produces beautiful and effective visualizations with a minimal amount of code. It offers a powerful and concise visualization grammar that enables you to build a wide range of statistical visualizations quickly.

Altair is a declarative statistical visualization library for Python, based on Vega and Vega-Lite. Altair’s API is simple, friendly and consistent and built on top of the powerful Vega-Lite visualization grammar. This elegant simplicity produces beautiful and effective visualizations with a minimal amount of code. It offers a powerful and concise visualization grammar that enables you to build a wide range of statistical visualizations quickly.

Altair - Declarative statistical visualization library for Python

Seaborn is a Python visualization library based on matplotlib. It provides a high-level interface for drawing attractive statistical graphics.Online documentation is available at seaborn.pydata.org. Installation requires numpy, scipy, pandas, and matplotlib. Some functions will optionally use statsmodels if it is installed.

Seaborn - Statistical data visualization using matplotlib

The Robot Operating System (ROS) is a flexible framework for writing robot software. It is a collection of tools, libraries, and conventions that aim to simplify the task of creating complex and robust robot behavior across a wide variety of robotic platforms. ROS was built from the ground up to encourage collaborative robotics software development.

ROS - The Robot Operating System

Kombu is a Messaging Framework for Python. The aim of Kombu is to make messaging in Python as easy as possible by providing an idiomatic high-level interface for the AMQ protocol, and also provide proven and tested solutions to common messaging problems.  It allows application authors to support several message server solutions by using pluggable transports.

Kombu is a Messaging Framework for Python. The aim of Kombu is to make messaging in Python as easy as possible by providing an idiomatic high-level interface for the AMQ protocol, and also provide proven and tested solutions to common messaging problems. It allows application authors to support several message server solutions by using pluggable transports.

Kombu - Messaging Framework for Python

This is a postgres client that does auto-completion and syntax highlighting. The pgcli is written using python prompt toolkit. Its feature include Auto-completion, Syntax highlighting, Multi line support, Pagination etc.

pgcli - Postgres CLI with autocompletion and syntax highlighting

Ptpython is an advanced Python REPL. It should work on all Python versions from 2.6 up to 3.5 and work cross platform (Linux, BSD, OS X and Windows).
<ul>
<li>Syntax highlighting.</li>
<li>Multiline editing (the up arrow works).</li>
<li>Autocompletion.</li>
<li>Mouse support. [1]</li>
<li>Support for color schemes.</li>
<li>Support for <a href="https://cirw.in/blog/bracketed-paste">bracketed paste</a> [2].</li>
<li>Both Vi and Emacs key bindings.</li>
<li>Support for double width (Chinese) characters.</li>
</ul>

Ptpython is an advanced Python REPL. It should work on all Python versions from 2.6 up to 3.5 and work cross platform (Linux, BSD, OS X and Windows).

ptpython - A better Python REPL

Werkzeug started as a simple collection of various utilities for WSGI applications and has become one of the most advanced WSGI utility modules. It includes a powerful debugger, fully featured request and response objects, HTTP utilities to handle entity tags, cache control headers, HTTP dates, cookie handling, file uploads, a powerful URL routing system and a bunch of community contributed addon modules. Werkzeug is the base of frameworks such as Flask and more, as well as in house frameworks developed for commercial products and websites.

Werkzeug started as a simple collection of various utilities for WSGI applications and has become one of the most advanced WSGI utility modules. It includes a powerful debugger, fully featured request and response objects, HTTP utilities to handle entity tags, cache control headers, HTTP dates, cookie handling, file uploads, a powerful URL routing system and a bunch of community contributed addon modules.

Werkzeug - The comprehensive WSGI web application library

Saleor is a rapidly-growing open source e-commerce platform that has served high-volume companies from branches like publishing and apparel since 2012. Based on Python and Django, the latest major update introduces a modular front end powered by a GraphQL API and written with React and TypeScript.
 
<ul>
<li>PWA: End users can shop offline for better sales and shopping experiences</li>
<li>GraphQL API: Access all data from any web or mobile client using the latest technology</li>
<li>Headless commerce: Build mobile apps, customize storefronts and externalize processes</li>
<li>UX and UI: Designed for a user experience that rivals even the top commercial platforms</li>
<li>Dashboard: Administrators have total control of users, processes, and products</li>
<li>Orders: A comprehensive system for orders, dispatch, and refunds</li>
<li>Cart: Advanced payment and tax options, with full control over discounts and promotions</li>
<li>Payments: Flexible API architecture allows integration of any payment method. It comes with Braintree support out of the box.</li>
<li>Geo-adaptive: Automatic localized pricing. Over 20 local languages. Localized checkout experience by country.</li>
<li>SEO: Packed with features that get stores to a wider audience</li>
<li>Cloud: Optimized for deployments using Docker</li>
<li>Analytics: Server-side Google Analytics to report e-commerce metrics without affecting privacy</li>
</ul>

Saleor is a rapidly-growing open source e-commerce platform that has served high-volume companies from branches like publishing and apparel since 2012. Based on Python and Django, the latest major update introduces a modular front end powered by a GraphQL API and written with React and TypeScript.

Saleor Commerce - A headless, GraphQL-first e-commerce platform delivering ultra-fast, dynamic, personalized shopping experiences

napari is a fast, interactive, multi-dimensional image viewer for Python. It’s designed for browsing, annotating, and analyzing large multi-dimensional images. It’s built on top of Qt (for the GUI), vispy (for performant GPU-based rendering), and the scientific Python stack (numpy, scipy). 
napari supports six main different layer types, Image, Labels, Points, Vectors, Shapes, and Surface, each corresponding to a different data type, visualization, and interactivity. You can add multiple layers of different types into the viewer and then start working with them, adjusting their properties.

napari is a fast, interactive, multi-dimensional image viewer for Python. It’s designed for browsing, annotating, and analyzing large multi-dimensional images. It’s built on top of Qt (for the GUI), vispy (for performant GPU-based rendering), and the scientific Python stack (numpy, scipy).

napari - a fast, interactive, multi-dimensional image viewer for python 

The numpy-financial package contains a collection of elementary financial functions. 

NumPy Financial -  Standalone package of the NumPy financial functions 

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