Removed iris interface (#3054)

environment.yml

@@ -15,7 +15,6 @@ dependencies:
   - pyviz/label/dev::param=1.8.0a10
   - pyviz::pyviz_comms=0.6.0
   - pyviz::datashader
-  - conda-forge::iris
   - conda-forge::netcdf4=1.3.1
   - conda-forge::ffmpeg
   - conda-forge::flexx=0.4.1

examples/user_guide/08-Gridded_Datasets.ipynb

@@ -13,7 +13,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import xarray as xr\n",
     "import numpy as np\n",
     "import holoviews as hv\n",
     "hv.extension('matplotlib')\n",
@@ -67,7 +66,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "However HoloViews also ships with interfaces for ``xarray`` and ``iris``, two common libraries for working with multi-dimensional datasets:"
+    "However HoloViews also ships with an interface for ``xarray`` and the [GeoViews](https://geoviews.org) library ships with an interface for ``iris`` objects, which are two common libraries for working with multi-dimensional datasets:"
    ]
   },
   {
@@ -81,13 +80,10 @@
     "\n",
     "try: \n",
     "    xr_img = img.clone(datatype=['xarray'])\n",
-    "    iris_img = img.clone(datatype=['cube'])\n",
     "\n",
-    "    print(type(xr_img.data))\n",
-    "    print(type(iris_img.data))\n",
-    "    \n",
+    "    print(type(xr_img.data))    \n",
     "except:\n",
-    "    print('One of the following data backend cannot be imported: xarray or iris')"
+    "    print('xarray interface could not be imported.')"
    ]
   },
   {

holoviews/core/data/__init__.py

@@ -33,16 +33,6 @@
     param.main.warning('Pandas interface failed to import with '
                        'following error: %s' % e)
 
-try:
-    import iris # noqa (Availability import)
-    from .iris import CubeInterface # noqa (Conditional API import)
-    datatypes.append('cube')
-except ImportError:
-    pass
-except Exception as e:
-    param.main.warning('Iris interface failed to import with '
-                       'following error: %s' % e)
-
 try:
     import xarray # noqa (Availability import)
     from .xarray import XArrayInterface # noqa (Conditional API import)