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download_file源码

def download_file(url: str, fname: str, chunk_size=1024):
    """Helper function to download a file from a given url"""
    resp = requests.get(url, stream=True)
    total = int(resp.headers.get("content-length", 0))
    with open(fname, "wb") as file, tqdm(
        desc=fname,
        total=total,
        unit="iB",
        unit_scale=True,
        unit_divisor=1024,
    ) as bar:
        for data in resp.iter_content(chunk_size=chunk_size):
            size = file.write(data)
            bar.update(size)

注释

    """
    从给定url下载文件并保存到本地。

    

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