Python Percentile using numpy

percentile.py

#!/usr/bin/env python3

# Backslasher, Jul 2017
#
# Based on https://gist.github.com/vikrum/8202564

import numpy
import argparse
import fileinput

parser = argparse.ArgumentParser(description='Percentile calc')
parser.add_argument('-p', '--percentile', metavar='P', nargs='+', type=float, default=[95], help='Percentile')
parser.add_argument('files', metavar='FILE', nargs='*', help='files to read, if empty, stdin is used')

args = parser.parse_args()
res = numpy.percentile(
    [float(line) for line in fileinput.input(files=args.files)],
    args.percentile
)
print(res)