this implies IDLE

1. does not support nested bars
2. does not garbage collect aggressively enough so is not closing old bars
   and thus attempting to nest them

Do you experience the same issue if just doing a normal trange twice?
On 1 Jul 2016 4:55 a.m., "Ofir Reich" notifications@github.com wrote:

from tqdm import *
import time

good

for i in trange(10):
time.sleep(0.2)

100%|██████████| 10/10 [00:02<00:00, 4.92it/s]

this will break things:

tqdm_pandas(tqdm())
0it [00:00, ?it/s]
for i in trange(10):
time.sleep(0.2)

0%| | 0/10 [00:00<?, ?it/s]�[A
10%|█ | 1/10 [00:00<00:01, 4.97it/s]�[A
20%|██ | 2/10 [00:00<00:01, 4.90it/s]�[A
30%|███ | 3/10 [00:00<00:01, 4.85it/s]�[A
40%|████ | 4/10 [00:00<00:01, 4.84it/s]�[A
50%|█████ | 5/10 [00:01<00:01, 4.84it/s]�[A
60%|██████ | 6/10 [00:01<00:00, 4.83it/s]�[A
70%|███████ | 7/10 [00:01<00:00, 4.82it/s]�[A
80%|████████ | 8/10 [00:01<00:00, 4.83it/s]�[A
90%|█████████ | 9/10 [00:01<00:00, 4.84it/s]�[A
100%|██████████| 10/10 [00:02<00:00, 4.84it/s]�[A
�[A

After running tqdm_pandas(tqdm()).
Some strange characters are printed instead of the carriage return action.
Running tqdm_pandas(tqdm()) again creates more of these strange characters
and new lines:

tqdm_pandas(tqdm())

0it [00:00, ?it/s]�[A�[A

for i in trange(10):
time.sleep(0.2)

0%| | 0/10 [00:00<?, ?it/s]�[A�[A�[A

10%|█ | 1/10 [00:00<00:01, 4.98it/s]�[A�[A�[A

20%|██ | 2/10 [00:00<00:01, 4.93it/s]�[A�[A�[A

30%|███ | 3/10 [00:00<00:01, 4.89it/s]�[A�[A�[A

40%|████ | 4/10 [00:00<00:01, 4.87it/s]�[A�[A�[A

50%|█████ | 5/10 [00:01<00:01, 4.84it/s]�[A�[A�[A

60%|██████ | 6/10 [00:01<00:00, 4.83it/s]�[A�[A�[A

70%|███████ | 7/10 [00:01<00:00, 4.83it/s]�[A�[A�[A

80%|████████ | 8/10 [00:01<00:00, 4.78it/s]�[A�[A�[A

90%|█████████ | 9/10 [00:01<00:00, 4.75it/s]�[A�[A�[A

100%|██████████| 10/10 [00:02<00:00, 4.78it/s]�[A�[A�[A

�[A�[A�[A

This only happens in IDLE. When I try the python in Shell it behaves fine
(except that it stays there after the loop is over).

Thanks for the amazing project!

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Correct.

>>> for i in trange(10):
    for j in trange(3):
        time.sleep(0.2)


  0%|          | 0/10 [00:00<?, ?it/s]
  0%|          | 0/3 [00:00<?, ?it/s]�[A
 33%|███▎      | 1/3 [00:00<00:00,  4.99it/s]�[A
 67%|██████▋   | 2/3 [00:00<00:00,  3.96it/s]�[A
100%|██████████| 3/3 [00:00<00:00,  4.18it/s]�[A
 10%|█         | 1/10 [00:00<00:07,  1.25it/s]
  0%|          | 0/3 [00:00<?, ?it/s]�[A
 33%|███▎      | 1/3 [00:00<00:00,  4.97it/s]�[A
 67%|██████▋   | 2/3 [00:00<00:00,  4.92it/s]�[A
100%|██████████| 3/3 [00:00<00:00,  4.88it/s]�[A
 20%|██        | 2/10 [00:01<00:05,  1.34it/s]
  0%|          | 0/3 [00:00<?, ?it/s]�[A
 33%|███▎      | 1/3 [00:00<00:00,  4.98it/s]�[A
 67%|██████▋   | 2/3 [00:00<00:00,  4.96it/s]�[A
...

Multiple bars work in python run from Shell.

Yes this is a well-known issue with IDLE, all progress bars are affected. IDLE can support only \t and \n control characters, but not any other. The main dev stated this was on purpose as it can ease debugging:

The tk Text widget used by IDLE only interprets \t and \n, but not other control characters. To some of us, this seems appropriate for a development environment, where erasing characters is less appropriate than in a production environment.

http://stackoverflow.com/a/35900117/1121352

Is there a way for tqdm to run only on the shell and not when you run from IDLE directly ?

@ayanez17 I think you're referring to something like #443