Gain insights into enhancing Python data processing with PySpark. Delve into reading, transforming, aggregating data, and creating user-defined functions, boosting efficiency with Apache Spark.

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Pandas is a popular Python library used to manipulate data, but it has certain limitations in its ability to process large datasets. The Apache Spark analytics library offers significant performance improvements.

This course will help improve your Python-based data processing by leveraging Apache Spark’s multithreading capabilities through the PySpark library. You’ll start by reading data into a PySpark DataFrame before performing basic input/output functions, such as renaming attributes, selecting, and writing data. You’ll move onto transformation functions like aggregation, statistical analysis, and joins before creating custom, user-defined functions. At each step, you’ll get a quick Pandas review before being walked through leveraging the more robust PySpark library to unlock Apache Spark.

By the end of this course, you’ll be able to quickly and reliably process large amounts of data, even stored across multiple files, using PySpark.

From Pandas to PySpark DataFrame

## Filter top reviews of 2017 in Pandas
We could determine top reviews based on the number of votes a review has received—for example, we could say 20 votes is a top review. However, a much better method would be to take the number of votes for all reviews into account, and  use `quantile` or `percentile`. We’ll consider a review as a top review only if the number of votes is higher than a particular percentile (75% for example).


# Filter top reviews of 2017 in Pandas
We could determine top reviews based on the number of votes a review has received—for example, we could say 20 votes is a top review. However, a much better method would be to take the number of votes for all reviews into account, and  use `quantile` or `percentile`. We’ll consider a review as a top review only if the number of votes is higher than a particular percentile (75% for example).


Learn how to filter data in Pandas and PySpark.

Introduction

Data Input/Output

Data Transformation

User Defined Function (UDF)

Wrapping Up

Appendix

Top reviews of 2017

Filter top reviews of 2017 in Pandas