import subprocess
import os
import pdb


workers = 10
ps = [subprocess.Popen(['python', 'processbf.py', str(workers), str(i)],
                        stdout=subprocess.PIPE, close_fds=True) for i in range(workers)]

try:
    os.remove("out.txt")
except:
    pass

mx = 0
while workers>mx:
    for p in ps[:]:
        line = p.stdout.readline()
        if line:
            with open("out.txt", 'a') as fo:
                fo.write(line)
        else:
            mx+=1