New color terminal prograss bar in pip

pip itself is using the rich package! In particular, their progress bar docs show this example:

from rich.progress import track

for n in track(range(n), description="Processing..."):
    do_work(n)

The following simple code uses pip own progress bar controls.

import time

from pip._internal.cli.progress_bars import get_download_progress_renderer


if __name__ == "__main__":
    chunks = []
    b = get_download_progress_renderer(bar_type="on",size=100)
    for i in range(100):
        chunks.append(range(i))
        for bb in b(chunks):
            time.sleep(.1)

The output will look something like this...

from rich.progress import track
import time 
i=20
for n in track(range(i), description="Processing..."):
    time.sleep(n)