I'm trying to use tqdm to monitor multiple FTP downloads using ftplib. Browsing around the documentation led me to this "canonical" example:

from time import sleep
from tqdm import tqdm
from multiprocessing import Pool, freeze_support

def progresser(n):
    text = "progresser #{}".format(n)
    for i in tqdm(range(5000), desc=text, position=n):
        sleep(0.001)

if __name__ == '__main__':
    freeze_support()  # for Windows support
    L = list(range(10))
    Pool(len(L)).map(progresser, L)

but on my system (Ubuntu 14.04, Python 3.4.3, tqdm 4.14.0) I get a mixture of empty lines, non-updating progress bars, and a single updating progress bar at the bottom:

If I watch the bottom progress bar carefully I can see that the name occasionally changes, so I think that the progress bars are being drawn on top of one another. I've searched the issues and the closest thing I can find is this:

#285

but I don't think it's the same problem, as that issue reported multiple updating progress bars visible and I am only seeing one (the screenshots are very different). Let me know if I can provide any other info - I really want to use tqdm for this project but am out of depth when it comes to trying to figure out what's wrong.