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What is Perspective?

Perspective is an interactive analytics and data visualization
component, which is especially well-suited for large and/or streaming
datasets. Use it to create user-configurable reports, dashboards,
notebooks and applications, then deploy stand-alone in the browser,
or in concert with Python and/or Jupyterlab.


Features


A fast, memory efficient streaming query engine, written in C++ and
compiled for both WebAssembly and Python, with read/write/streaming
for Apache Arrow, and a high-performance columnar expression language
based on ExprTK.

A framework-agnostic User Interface packaged as a Custom Element,
powered either in-browser via WebAssembly or virtually via WebSocket
server (Python/Node).

A JupyterLab widget and Python client library, for interactive data
analysis in a notebook, as well as scalable production Voila
applications.

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JavaScript

Interactive dashboards built on Perspective.js Custom Elements are
easy to integrate into any web application framework.

Using Perspective's simple query language, elements like
<perspective-viewer> can be symmetrically configured via API or User
interaction. Web Applications built with Perspective Custom Elements
can be re-hydrated from their serialized state, driven from external
Events, or persisted to any store. Workspaces can mix virtual,
server-side Python data with in-browser client data seamlessly, and
independent data Views can be cross-filtered, duplicated, exported,
stacked and saved.

To achieve Desktop-like performance in the Browser, Perspective.js
relies on WebAssembly for excellent query calculation time, and
Apache Arrow for its conservative memory footprint and efficient data
serialization.

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Python

`perspective-python`, built on the same C++ data engine used by the
WebAssembly version, implements the Perspective API directly in
Python, either as a virtualized server for Production, or as an
embedded JupyterLab Widget for Research.

For Application Developers, virtualized <perspective-viewer> will
only consume the data necessary to render the current screen,
enabling ludicrous size datasets with nearly instant load. Or -
stream the entire dataset to the WebAssembly runtime via efficiently
via Apache Arrow, and give your server a break!

For Researchers and Data Scientists, PerspectiveWidget is available
as a Jupyter/JupyterLab widget, allowing interactive Pandas and
Apache Arrow visualization within a notebook.


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Docs

  * JavaScript User Guide
  * Python User Guide

More

  * GitHub
  * FINOS
  * Blog

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