Python progress bar and downloads

Question

I have a python script that launches a URL that is a downloadable file. Is there some way to have python use commandline to display the download progress as oppose to launch

Answer 1

The tqdm package now includes a function designed to handle exactly this type of situation: wrapattr. You just wrap an object's read (or write) attribute, and tqdm handles the rest. Here's a simple download function that puts it all together with requests:

def download(url, filename):
    import functools
    import pathlib
    import shutil
    import requests
    import tqdm
    
    r = requests.get(url, stream=True, allow_redirects=True)
    if r.status_code != 200:
        r.raise_for_status()  # Will only raise for 4xx codes, so...
        raise RuntimeError(f"Request to {url} returned status code {r.status_code}")
    file_size = int(r.headers.get('Content-Length', 0))

    path = pathlib.Path(filename).expanduser().resolve()
    path.parent.mkdir(parents=True, exist_ok=True)

    desc = "(Unknown total file size)" if file_size == 0 else ""
    r.raw.read = functools.partial(r.raw.read, decode_content=True)  # Decompress if needed
    with tqdm.tqdm.wrapattr(r.raw, "read", total=file_size, desc=desc) as r_raw:
        with path.open("wb") as f:
            shutil.copyfileobj(r_raw, f)

    return path