diff --git a/python/test/sandbox/test.ipynb b/python/test/sandbox/test.ipynb
index 9d9ff84..b50c948 100644
--- a/python/test/sandbox/test.ipynb
+++ b/python/test/sandbox/test.ipynb
@@ -48,24 +48,23 @@
    ],
    "source": [
     "# importing classical numpy objects\n",
-    "from numpy import zeros, array, identity, dot\n",
-    "from numpy.linalg import norm\n",
     "import numpy as np\n",
+    "from numpy import array, dot, identity, zeros\n",
+    "from numpy.linalg import norm\n",
     "\n",
-    "np.set_printoptions(formatter={\"float\": lambda x: \"{0:0.1f}\".format(x)})\n",
+    "np.set_printoptions(formatter={\"float\": lambda x: f\"{x:0.1f}\"})\n",
     "\n",
     "# use array representation for binding eigen objects to python\n",
-    "import eigenpy\n",
     "\n",
     "\n",
     "# importing the bezier curve class\n",
+    "import matplotlib.pyplot as plt\n",
+    "import numpy as np\n",
+    "\n",
     "from ndcurves import bezier\n",
     "\n",
     "# importing tools to plot bezier curves\n",
     "from ndcurves.plot import plotBezier\n",
-    "from mpl_toolkits.mplot3d import Axes3D\n",
-    "import matplotlib.pyplot as plt\n",
-    "import numpy as np\n",
     "\n",
     "# We describe a degree 3 curve as a Bezier curve with 4 control points\n",
     "waypoints = array(\n",