21 lines
621 B
Python
21 lines
621 B
Python
|
import sys
|
||
|
from random import random
|
||
|
from operator import add
|
||
|
from pyspark.context import SparkContext
|
||
|
|
||
|
|
||
|
if __name__ == "__main__":
|
||
|
if len(sys.argv) == 1:
|
||
|
print >> sys.stderr, \
|
||
|
"Usage: PythonPi <host> [<slices>]"
|
||
|
exit(-1)
|
||
|
sc = SparkContext(sys.argv[1], "PythonKMeans")
|
||
|
slices = sys.argv[2] if len(sys.argv) > 2 else 2
|
||
|
n = 100000 * slices
|
||
|
def f(_):
|
||
|
x = random() * 2 - 1
|
||
|
y = random() * 2 - 1
|
||
|
return 1 if x ** 2 + y ** 2 < 1 else 0
|
||
|
count = sc.parallelize(xrange(1, n+1), slices).map(f).reduce(add)
|
||
|
print "Pi is roughly %f" % (4.0 * count / n)
|