I figured out a nice way to get the loading bar from the pip installer's rich package

pip_loading_bar.py

import asyncio
from pip._vendor.rich.progress import Progress, TextColumn, SpinnerColumn, TimeElapsedColumn, BarColumn, TaskProgressColumn, TimeRemainingColumn


async def loading_bar():
    some_dataset = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]

    progress = Progress(
        SpinnerColumn(),
        TimeElapsedColumn(),
        BarColumn(),
        TaskProgressColumn(),
        TimeRemainingColumn(),
    )

    with progress:
        print("\nStarted!")
        # make sure whatever you're iterating over has progress.track()
        for entry in progress.track(some_dataset):
            # simulating work being done
            await asyncio.sleep(0.5)
        print("Complete!")

    # DESCRIPTION EXAMPLE:

    progress_description = Progress(
        TextColumn("[progress.description]{task.description}"),
        SpinnerColumn(),
        TimeElapsedColumn(),
        BarColumn(),
        TaskProgressColumn(),
        TimeRemainingColumn(),
    )

    with progress_description:
        print("\nStarted!")
        # you can add custom text in the description field
        for entry in progress_description.track(some_dataset, description="Working hard..."):
            # simulating work being done
            await asyncio.sleep(0.5)
        print("Complete!")

asyncio.run(loading_bar())