Fixed #16573 -- Corrected a regression in the admindocs app's view overview...

    """

    views = []

    for p in urlpatterns:

        if hasattr(p, 'callback'):

            try:

                views.append((p.callback, base + p.regex.pattern))

            except ViewDoesNotExist:

                continue

        elif hasattr(p, 'url_patterns'):

        if hasattr(p, 'url_patterns'):

            try:

                patterns = p.url_patterns

            except ImportError:

                continue

            views.extend(extract_views_from_urlpatterns(patterns, base + p.regex.pattern))

        elif hasattr(p, 'callback'):

            try:

                views.append((p.callback, base + p.regex.pattern))

            except ViewDoesNotExist:

                continue

        else:

            raise TypeError(_("%s does not appear to be a urlpattern object") % p)

    return views