Makes numpy linspace ranges from the shell, even chain together with commas

linspace.py

#!/usr/bin/env python

import numpy
import sys

if len(sys.argv) < 4:
	print( "Usage: linspace start stop step [, endpoint, ndecimals]" )
	exit()

if not sys.stdin.isatty():
	for line in sys.stdin:
		sys.stdout.write(line.strip())

start = float(sys.argv[1])
stop  = float(sys.argv[2])
nbins = int(sys.argv[3])
ndigits = 2;
endpoint = True


if len( sys.argv ) > 4:
	endpoint = sys.argv[4].lower() == 'true'
	# also support 0,1 for false/true
	if sys.argv[4] == "0":
		endpoint = False
	if sys.argv[4] == "1":
		endpoint = True
if len( sys.argv ) > 5:
	ndigits = sys.argv[5]


vals = ""
fmt = "%0." + str(ndigits) + "f"
for v in numpy.linspace( start, stop, nbins, endpoint ):
	vals = vals + fmt % v + ", "

if not sys.stdin.isatty() :
	print(", " + vals[:-2])
else :
	print(vals[:-2])

usage.sh

#Usage Example:
$> linspace 0 5 6 False 3 | linspace 5 6 10 1 1
0.000, 0.833, 1.667, 2.500, 3.333, 4.167, 5.0, 5.1, 5.2, 5.3, 5.4, 5.6, 5.7, 5.8, 5.9, 6.0