Explain Spark Application with example

In this tutorial, we will go through a simple spark application. We will be making use of pyspark for the example.

Explain Spark Application with example

A Spark application is a self-contained calculation that generates a result using user-supplied code. Even when a Spark application isn't running a job, it can have processes operating on its behalf.

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Let us see the code for creating a very basic spark application –

Code:
import pyspark
from pyspark.sql import SparkSession

spark = SparkSession.builder.appName('SparkApplicationExample').getOrCreate()
sc=spark.sparkContext

nums= sc.parallelize([1,2,3,4])

print(nums.take(1))

Output:
[1]

We can even apply transformations such as -

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Code:
#applying transformation to data
squared = nums.map(lambda x: x*x).collect()
for num in squared:
print('%i ' % (num))

 
Output:
1 
4 
9 
16

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