Dica 24 - Barra de progresso

• progress

• tqdm

• click - click progressbar

• progressbar 2

• clint

• with sys

• gist rg3915

• progressbar on Jupyter notebook

Leia mais em How to Easily Use a Progress Bar in Python

progress

pip install progress

# example01_progress.py
from time import sleep

from progress.bar import Bar

with Bar('Processing...') as bar:
    for i in range(100):
        sleep(0.02)
        bar.next()

$ python example01_progress.py

tqdm

pip install tqdm

from time import sleep

# example02_tqdm.py
from tqdm import tqdm

for i in tqdm(range(100)):
    sleep(0.02)
    # Do something

python example02_tqdm.py

click

click progressbar

pip install click

from time import sleep

# example03_click.py
import click

# Fill character is # by default, you can change it
# for any other char you want, or even change the color.
fill_char = click.style('=', fg='yellow')
with click.progressbar(range(100), label='Loading...', fill_char=fill_char) as bar:
    for i in bar:
        sleep(0.02)

python example03_click.py

progressbar 2

pip install progressbar2

# example04_progressbar2.py
from time import sleep

from progressbar import progressbar

for i in progressbar(range(100)):
    sleep(0.02)

python example04_progressbar2.py

clint

pip install clint

# example05_clint.py
from time import sleep

from clint.textui import progress

print('Clint - Regular Progress Bar')
for i in progress.bar(range(100)):
    sleep(0.02)

print('Clint - Mill Progress Bar')
for i in progress.mill(range(100)):
    sleep(0.02)

python example05_clint.py

with sys

import sys
# example06_sys.py
import time

toolbar_width = 40

# setup toolbar
sys.stdout.write("[%s]" % (" " * toolbar_width))
sys.stdout.flush()
sys.stdout.write("\b" * (toolbar_width+1)) # return to start of line, after '['

for i in range(toolbar_width):
    time.sleep(0.1) # do real work here
    # update the bar
    sys.stdout.write("-")
    sys.stdout.flush()

sys.stdout.write("]\n") # this ends the progress bar

python example06_sys.py

gist rg3915

# example07_sys.py
import sys
import time


def progressbar(it, prefix="", size=60, file=sys.stdout):
    count = len(it)

    def show(j):
        x = int(size * j / count)
        file.write("%s[%s%s] %i/%i\r" %
                   (prefix, "#" * x, "." * (size - x), j, count))
        file.flush()
    show(0)
    for i, item in enumerate(it):
        yield item
        show(i + 1)
    file.write("\n")
    file.flush()


users = ['Regis', 'Abel', 'Eduardo', 'Elaine']


for user in progressbar(users, "Processing: "):
    time.sleep(0.1)
    # Do something.


for i in progressbar(range(42), "Processing: "):
    time.sleep(0.05)
    # Do something.

python example07_sys.py

progressbar on Jupyter notebook

$ jupyter notebook

# progressbar_jupyter.ipynb
import sys

if hasattr(sys.modules["__main__"], "get_ipython"):
    from tqdm import notebook as tqdm
else:
    import tqdm

from time import sleep

n = 0
for i in tqdm.trange(100):
    n += 1
    sleep(0.01)

url = "https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tgz"
import httpx

with httpx.stream("GET", url) as response:
    total = int(response.headers["Content-Length"])
    with tqdm.tqdm(total=total) as progress:
        for chunk in response.iter_bytes():
            progress.update(len(chunk))