Find the median of a list of values.

median.py

import argparse
import numpy

parser = argparse.ArgumentParser(description='Find the median of a list of values.')
parser.add_argument('values', metavar='N', type=float, nargs='+')

args = parser.parse_args()
values = args.values
values.sort()

median = numpy.median(values)

print 'Median: ' + str(median)
print 'Sorted: [' + ', '.join(map(str, values)) + ']'

Run it in the command line: python median.py 10 4 19 20