Python downloader w/ Requests

downloader.py

import requests
import sys


def download_file(url, filename):
    with open(filename, "wb") as file:
        print(f"Downloading {filename}")
        response = requests.get(url, stream=True)
        length = response.headers.get("Content-Length")

        if length is None:
            file.write(response.content)
        else:
            fsize = (int(length) / 1024 / 1024)
            print("Length: {0:0.2f}MB".format(fsize))
            progress = 0
            length = int(length)
            for data in response.iter_content(chunk_size=int(length/100)):
                progress += len(data)
                file.write(data)
                done = int(100 * progress / length)
                sys.stdout.write("\r[%s%s]" % ('#' * done, ' ' * (100 - done)))
                sys.stdout.flush()
        print("Complete")


if __name__ == "__main__":
    if len(sys.argv) > 2:
        url = sys.argv[1]
        filename = sys.argv[2]
        download_file(url, filename)
    else:
        print("Downloader")
        print(f"{sys.argv[0]} <URL> <Filename>")