pi.py

from __future__ import print_function
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

import sys
from random import uniform

from pyspark import SparkContext

def in_circle(_):
    x = uniform(-1.0, 1.0)
    y = uniform(-1.0, 1.0)
    return x ** 2 + y ** 2 <= 1

if __name__ == "__main__":
    """
        Usage: pi
    """

    sc = SparkContext(appName="PythonPi")
    sc.setLogLevel('WARN')
    n = 1000000000
    count = sc.parallelize(xrange(1, n + 1)).filter(in_circle).count()
    print("PI=%.12f" % (4.0 * count / n))
    print("N=%i" % count)

    sc.stop()