DOC: Example use urllib.request import urlretrieve

Assumes Python 3; we are only supporting Python 3 now.

Make a note that VTK-based examples do not work in MyBinder due to the
VTK wheel.

Author: thewtex

examples/2DImage.ipynb

@@ -18,10 +18,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "try:\n",
-    "    from urllib.request import urlretrieve\n",
-    "except ImportError:\n",
-    "    from urllib import urlretrieve\n",
+    "from urllib.request import urlretrieve\n",
     "import os\n",
     "\n",
     "import itk\n",
@@ -50,27 +47,12 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "5cd80ad0009c484fa13efdc01518b414",
+       "model_id": "e276ebbbb0d0453f912d6211ca340e7d",
        "version_major": 2,
        "version_minor": 0
       },
-      "text/html": [
-       "<p>Failed to display Jupyter Widget of type <code>Viewer</code>.</p>\n",
-       "<p>\n",
-       "  If you're reading this message in the Jupyter Notebook or JupyterLab Notebook, it may mean\n",
-       "  that the widgets JavaScript is still loading. If this message persists, it\n",
-       "  likely means that the widgets JavaScript library is either not installed or\n",
-       "  not enabled. See the <a href=\"https://ipywidgets.readthedocs.io/en/stable/user_install.html\">Jupyter\n",
-       "  Widgets Documentation</a> for setup instructions.\n",
-       "</p>\n",
-       "<p>\n",
-       "  If you're reading this message in another frontend (for example, a static\n",
-       "  rendering on GitHub or <a href=\"https://nbviewer.jupyter.org/\">NBViewer</a>),\n",
-       "  it may mean that your frontend doesn't currently support widgets.\n",
-       "</p>\n"
-      ],
       "text/plain": [
-       "Viewer(image=<itkImagePython.itkImageUC2; proxy of <Swig Object of type 'itkImageUC2 *' at 0x7ff04954d720> >)"
+       "Viewer(geometries=[], gradient_opacity=0.22, point_sets=[], rendered_image=<itkImagePython.itkImageUC2; proxy …"
       ]
      },
      "metadata": {},
@@ -81,34 +63,27 @@
     "image = itk.imread(file_name)\n",
     "view(image)"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.13"
+   "pygments_lexer": "ipython3",
+   "version": "3.7.5"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 2
+ "nbformat_minor": 4
 }

examples/Checkerboard.ipynb

@@ -18,10 +18,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "try:\n",
-    "    from urllib.request import urlretrieve\n",
-    "except ImportError:\n",
-    "    from urllib import urlretrieve\n",
+    "from urllib.request import urlretrieve\n",
     "import os\n",
     "\n",
     "import itk\n",
@@ -64,7 +61,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "51f99684be064f0eb09b0ab1ee44d3e8",
+       "model_id": "2517d2aa6bd34771a51d0a02da3da685",
        "version_major": 2,
        "version_minor": 0
       },
@@ -83,9 +80,9 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
@@ -97,9 +94,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.6"
+   "version": "3.7.5"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 2
+ "nbformat_minor": 4
 }