muassif
23 lines
522 B
Python
23 lines
522 B
Python
#casestudy1: Pi calculater
|
|
from operator import add
|
|
from random import random
|
|
|
|
from pyspark.sql import SparkSession
|
|
|
|
spark = SparkSession.builder.master("spark://192.168.64.2:7077") \
|
|
.appName("Pi claculator app") \
|
|
.getOrCreate()
|
|
|
|
partitions = 2
|
|
n = 10000000 * partitions
|
|
|
|
|
|
def f(_):
|
|
x = random() * 2 - 1
|
|
y = random() * 2 - 1
|
|
return 1 if x ** 2 + y ** 2 <= 1 else 0
|
|
|
|
|
|
count = spark.sparkContext.parallelize(range(1, n + 1), partitions).map(f).reduce(add)
|
|
print("Pi is roughly %f" % (4.0 * count / n))
|