shuffle_stack_lines.py

from __future__ import print_function
import argparse
import random

parser = argparse.ArgumentParser()
parser.add_argument('text_input', help='Path to input file')
parser.add_argument('--seed', type=int, default=313,
                    help='Seed of random')
parser.add_argument('--stack', type=int, default=9,
                    help='Number of stack (default: 9)'),


args = parser.parse_args()


with open(args.text_input, 'r') as fd:
    s = 0

    slines = []
    while True:
        lines = []
        for i in xrange(args.stack):
            line = fd.readline()
            if line == '':
                break
            lines += [line]
        if len(lines) == 0:
            break
        elif len(lines) == args.stack:
            slines += [lines]
        else:
            raise ValueError(
                "The text must have number of lines"
                "with multiple of stack={}".format(args.stack))

random.seed(args.seed)
random.shuffle(slines)
for lines in slines:
    for line in lines:
        print(line, end='')