Download a file using urllib2

dlfile.py

def dl_file(url, directory=os.path.dirname(__file__), user=None, password=None, filename=None):
    """
    Download a file from a url to a directory

    @param url: url of a file
    @param directory: directory to save the file into
    @return: True if file was downloaded successfully, False otherwise
    """

    # Disable the proxy
    proxy_handler = urllib2.ProxyHandler({})
    opener = urllib2.build_opener(proxy_handler)
    urllib2.install_opener(opener)

    request = urllib2.Request(url)

    # Encode username and password if exists
    if user and password:
        base64string = base64.encodestring("{}:{}".format(user, password)).replace("\n", "")
        request.add_header("Authorization", "Basic {}".format(base64string))

    if not filename:
        filename = os.path.basename(url)

    # Open the url
    try:
        result = urllib2.urlopen(request)
        logging.info("Downloading {}".format(url))

        # Open our local file for writing
        with open(os.path.join(directory, filename), "wb") as local_file:
            local_file.write(result.read())

    # Handle errors
    except urllib2.HTTPError, e:
        logging.error("HTTP Error: {} {}".format(e.code, url))
        return False
    except urllib2.URLError, e:
        logging.error("URL Error: {} {}".format(e.reason, url))
        return False
    else:
        return True