Book Image

PySpark Cookbook

By : Denny Lee, Tomasz Drabas
Book Image

PySpark Cookbook

By: Denny Lee, Tomasz Drabas

Overview of this book

Apache Spark is an open source framework for efficient cluster computing with a strong interface for data parallelism and fault tolerance. The PySpark Cookbook presents effective and time-saving recipes for leveraging the power of Python and putting it to use in the Spark ecosystem. You’ll start by learning the Apache Spark architecture and how to set up a Python environment for Spark. You’ll then get familiar with the modules available in PySpark and start using them effortlessly. In addition to this, you’ll discover how to abstract data with RDDs and DataFrames, and understand the streaming capabilities of PySpark. You’ll then move on to using ML and MLlib in order to solve any problems related to the machine learning capabilities of PySpark and use GraphFrames to solve graph-processing problems. Finally, you will explore how to deploy your applications to the cloud using the spark-submit command. By the end of this book, you will be able to use the Python API for Apache Spark to solve any problems associated with building data-intensive applications.
Table of Contents (13 chapters)
Title Page
Packt Upsell

Visualizing the graph

In the preceding recipes, we have been visualizing our flights using Databrick notebook's native visualizations (for example, bar chart, line chart, maps, and so on). But we have not yet visualized our graph as a graph. In this section, we will leverage Mike Bostock's Airports D3.js visualization ( within our Databricks notebook.

Getting ready

Ensure that you have created thegraphGraphFrame and the source deptsDelays_GEO DataFrame from the preceding subsections.

How to do it...

We will be leveraging our Python Databricks notebook, but we will include the following Scala cell. At the top level here's the flow of the code:

package d3a

import org.apache.spark.sql._
import com.databricks.backend.daemon.driver.EnhancedRDDFunctions.displayHTML

case class Edge(src: String, dest: String, count: Long)
case class Node(name: String)
case class Link(source: Int, target: Int, value: Long)
case class Graph(nodes: Seq[Node...