fix: defer ipython to the function body as it is not a dependency

Author: oesteban

niworkflows/viz/__init__.py

@@ -1,8 +1,5 @@
-# -*- coding: utf-8 -*-
 # emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: nil -*-
 # vi: set ft=python sts=4 ts=4 sw=4 et:
-from __future__ import absolute_import, division, print_function, unicode_literals
-
 from .plots import plot_carpet
 from .utils import SVGNS
 

niworkflows/viz/notebook.py

@@ -3,7 +3,6 @@
 import numpy as np
 import nibabel as nb
 from .utils import compose_view, plot_registration, cuts_from_bbox
-from IPython.display import SVG, display as _disp
 
 
 def display(
@@ -15,6 +14,7 @@ def display(
     moving_label="M",
 ):
     """Plot the flickering panels to show a registration process."""
+    from IPython.display import SVG, display as _disp
     if isinstance(fixed_image, (str, Path)):
         fixed_image = nb.load(str(fixed_image))
     if isinstance(moving_image, (str, Path)):