okay, i agree this is cleaner

gallery.py

@@ -49,8 +49,9 @@ def send_thumb(tgt):
         image.resize(map(int, (scale * sz[0], scale * sz[1])), Image.ANTIALIAS).save(thumb_path)
     return send_file(thumb_path)
 
+@app.route('/')
 @app.route('/<path:tgt>')
-def view(tgt):
+def view(tgt=''):
     try: 
         path = abspath(safe_join(base, tgt))
         names = map(lambda s: s.decode(app.config['CHARSET']), os.listdir(path))
@@ -61,7 +62,6 @@ def view(tgt):
         if e.errno == 2:
             abort(404)
 
-app.route('/')(lambda: view(''))
 
 if __name__ == '__main__':
     app.run('::', 8080, debug=True)