How to use the watchmaker.utils.urllib function in watchmaker

@backoff.on_exception(backoff.expo, urllib.error.URLError, max_tries=5)
def urlopen_retry(uri):
    """Retry urlopen on exception."""
    kwargs = {}
    try:
        # trust the system's default CA certificates
        # proper way for 2.7.9+ on Linux
        if uri.startswith("https://"):
            kwargs['context'] = ssl.create_default_context(
                ssl.Purpose.CLIENT_AUTH
            )
    except AttributeError:
        pass

    return urllib.request.urlopen(uri, **kwargs)

Path where the file will be saved.

        """
        # Convert a local path to a URI
        url = watchmaker.utils.uri_from_filepath(url)
        self.log.debug('Downloading: %s', url)
        self.log.debug('Destination: %s', filename)

        try:
            self.log.debug('Establishing connection to the host, %s', url)
            response = watchmaker.utils.urlopen_retry(url)
            self.log.debug('Opening the file handle, %s', filename)
            with open(filename, 'wb') as outfile:
                self.log.debug('Saving file to local filesystem...')
                shutil.copyfileobj(response, outfile)
        except (ValueError, urllib.error.URLError):
            self.log.critical(
                'Failed to retrieve the file. url = %s. filename = %s',
                url, filename
            )
            raise
        self.log.info(
            'Retrieved the file successfully. url=%s. filename=%s',
            url, filename
        )

def urlopen_retry(uri):
    """Retry urlopen on exception."""
    kwargs = {}
    try:
        # trust the system's default CA certificates
        # proper way for 2.7.9+ on Linux
        if uri.startswith("https://"):
            kwargs['context'] = ssl.create_default_context(
                ssl.Purpose.CLIENT_AUTH
            )
    except AttributeError:
        pass

    return urllib.request.urlopen(uri, **kwargs)