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