Currently fails behind proxy...
    # https://docs.python.org/3/library/urllib.request.html#examples

def download_file_proxy(p_url, p_op_file, p_username, p_password, proxies):
    """
    Currently fails behind proxy...
    # https://docs.python.org/3/library/urllib.request.html#examples
    """
    chunk_size=4096
    import requests
    r = requests.get(p_url, auth=(p_username, p_password), proxies=proxies)
    #print(r.status_code)
    with open(p_op_file, 'wb') as fd:
        for chunk in r.iter_content(chunk_size):
            fd.write(chunk)  
    return r.status_code