问题
When using the tqdm progress bar: can I add a message to the same line as the progress bar in a loop?
I tried using the "tqdm.write" option, but it adds a new line on every write. I would like each iteration to show a short message next to the bar, that will disappear in the next iteration. Is this possible?
回答1:
You can change the description to show a small message before the progress bar, like this:
from tqdm import trange
from time import sleep
t = trange(100, desc='Bar desc', leave=True)
for i in t:
t.set_description("Bar desc (file %i)" % i)
t.refresh() # to show immediately the update
sleep(0.01)
/EDIT: in the latest releases of tqdm
, you can use t.set_description("text", refresh=True)
(which is the default) and remove t.refresh()
(thanks to Daniel for the tip).
回答2:
The example shown in Usage of tqdm works well for me.
pbar = tqdm(["a", "b", "c", "d"])
for char in pbar:
pbar.set_description("Processing %s" % char)
回答3:
You can add a desc
argument into the tqdm function.
from tqdm import tqdm
x = [5]*1000
for _ in tqdm(x, desc="Example"):
pass
Example: 100%|██████████████████████████████████| 1000/1000 [00:00<00:00, 1838800.53it/s]
回答4:
You can use set_postfix
to add values directly to the bar.
Example:
from tqdm import tqdm
pbar = tqdm(["a", "b", "c", "d"])
num_vowels = 0
for ichar in pbar:
if ichar in ['a','e','i','o','u']:
num_vowels += 1
pbar.set_postfix({'num_vowels': num_vowels})
The postfix dictionary is integrated into the progress bar:
100%|███████████| 4/4 [00:11<00:00, 2.93s/it, num_vowels=1]
Instead of a dictionary, you can use set_postfix_str
to just add a string to the end of the progress bar.
来源:https://stackoverflow.com/questions/37506645/can-i-add-message-to-the-tqdm-progressbar