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

While working in our day-to-day lives, we might not be able to finish an entire project by the end of the day. It can be really tedious when we have to re-run all the code from yesterday to get started. To counter this problem, we can create a snapshot of our current work which saves us valuable time when dealing with big data.



We create separate directories for screenshots for `pandas` and `Pyspark`.

We use the command below to create a directory for screenshots for `pandas`:

``` shell
mkdir -p data/snapshot/pandas
```
We use the command below to create a directory for screenshots for `pandas`:
```shell
mkdir -p data/snapshot/pyspark
```

# Save data in Pandas

In pandas, we can save a snapshot of a DataFrame in several file formats such as CSV, JSON, HDF, and others.

Learn to save progress in pandas and PySpark.


Data Input and Output: Save a Snapshot


Learn to save progress in pandas and PySpark.

Introduction

Data Input/Output

Data Transformation

User Defined Function (UDF)

Wrapping Up

Appendix

Data Input and Output: Save a Snapshot