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Data Ingestion with Python Cookbook

You're reading from   Data Ingestion with Python Cookbook A practical guide to ingesting, monitoring, and identifying errors in the data ingestion process

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Product type Paperback
Published in May 2023
Publisher Packt
ISBN-13 9781837632602
Length 414 pages
Edition 1st Edition
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Author (1):
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Gláucia Esppenchutz Gláucia Esppenchutz
Author Profile Icon Gláucia Esppenchutz
Gláucia Esppenchutz
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Toc

Table of Contents (17) Chapters Close

Preface 1. Part 1: Fundamentals of Data Ingestion
2. Chapter 1: Introduction to Data Ingestion FREE CHAPTER 3. Chapter 2: Principals of Data Access – Accessing Your Data 4. Chapter 3: Data Discovery – Understanding Our Data before Ingesting It 5. Chapter 4: Reading CSV and JSON Files and Solving Problems 6. Chapter 5: Ingesting Data from Structured and Unstructured Databases 7. Chapter 6: Using PySpark with Defined and Non-Defined Schemas 8. Chapter 7: Ingesting Analytical Data 9. Part 2: Structuring the Ingestion Pipeline
10. Chapter 8: Designing Monitored Data Workflows 11. Chapter 9: Putting Everything Together with Airflow 12. Chapter 10: Logging and Monitoring Your Data Ingest in Airflow 13. Chapter 11: Automating Your Data Ingestion Pipelines 14. Chapter 12: Using Data Observability for Debugging, Error Handling, and Preventing Downtime 15. Index 16. Other Books You May Enjoy

Using PySpark to read JSON files

In the Reading a JSON file recipe, we saw that JSON files are widely used to transport and share data between applications, and we saw how to read a JSON file using simple Python code.

However, with the increase in data size and sharing, using only Python to process a high volume of data can lead to performance or resilience issues. That’s why, for this type of scenario, it is highly recommended to use PySpark to read and process JSON files. As you might expect, PySpark comes with a straightforward reading solution.

In this recipe, we will cover how to read a JSON file with PySpark, the common associated issues, and how to solve them.

Getting ready

As in the previous recipe, Reading a JSON file, we are going to use the GitHub Events JSON file. Also, the use of Jupyter Notebook is optional.

How to do it…

Here are the steps for this recipe:

  1. We first create the SparkSession:
    spark = .builder \
      &...
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