PySpark Cheat Sheet: Spark DataFrames in Python
You’ll probably already know about Apache Spark, the fast, general and open-source engine for big data processing; It has built-in modules for streaming, SQL, machine learning and graph processing. Spark allows you to speed analytic applications up to 100 times faster compared to other technologies on the market today. Interfacing Spark with Python is easy with PySpark: this Spark Python API exposes the Spark programming model to Python.
The PySpark Basics cheat sheet already showed you how to work with the most basic building blocks, RDDs.
Now, it’s time to tackle the Spark SQL module, which is meant for structured data processing, and the DataFrame API, which is not only available in Python, but also in Scala, Java, and R. If you want to know more about the differences between RDDs, DataFrames, and DataSets, consider taking a look at Apache Spark in Python: Beginner’s Guide.
Without further ado, here’s the cheat sheet:
Click here to download the cheat sheet.
This PySpark SQL cheat sheet covers the basics of working with the Apache Spark DataFrames in Python: from initializing the SparkSession to creating DataFrames, inspecting the data, handling duplicate values, querying, adding, updating or removing columns, grouping, filtering or sorting data. You’ll also see that this cheat sheet also on how to runSQL Queries programmatically, how to save your data to parquet and JSON files, and how to stop your SparkSession.
Originally published at www.datacamp.com.