This python script randomly splits a file into n parts.

rsplit.py

#! /bin/python
'''Tim Sears - 2016
Randomly splits a file into n parts'''

from random import randint
import argparse
import gzip 
parser = argparse.ArgumentParser(description='Split file into n random partitions')
parser.add_argument('--file', type=str, default='/dev/stdin',
                    help='the file to read from')
parser.add_argument('--n', type=int, default=10,
		    help='the number of files to split to')
parser.add_argument('--prefix', type=str, default='partition',
		    help='the prefix for the split files')
parser.add_argument('--gzip',  default=False, action='store_true',
		    help='gzip the output files')

args = parser.parse_args()

with open(args.file) as source:
	if not args.gzip:
		files =[open(args.prefix+str(i),'w') for i in range(args.n)]
	else:
		files = [gzip.open(args.prefix+str(i)+'.gz','w') for i in range(args.n)]
	try:
		for line in source:
			files[randint(0,args.n-1)].write(line)
	finally:
		[a.close() for a in files]

add gzip capability