38 lines
1.3 KiB
Python
Executable file
38 lines
1.3 KiB
Python
Executable file
#
|
|
# 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 random
|
|
from operator import add
|
|
|
|
from pyspark import SparkContext
|
|
|
|
|
|
if __name__ == "__main__":
|
|
if len(sys.argv) == 1:
|
|
print >> sys.stderr, "Usage: pi <master> [<slices>]"
|
|
exit(-1)
|
|
sc = SparkContext(sys.argv[1], "PythonPi")
|
|
slices = int(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)
|