Add warning and note docs for scipy (#1842) (#1966)

docs/source/models.rst

@@ -183,11 +183,19 @@ Inception v3
 
 .. autofunction:: inception_v3
 
+.. note ::
+    This requires `scipy` to be installed
+
+
 GoogLeNet
 ------------
 
 .. autofunction:: googlenet
 
+.. note ::
+    This requires `scipy` to be installed
+
+
 ShuffleNet v2
 -------------
 

torchvision/datasets/caltech.py

@@ -10,6 +10,10 @@ from .utils import download_and_extract_archive, makedir_exist_ok, verify_str_ar
 class Caltech101(VisionDataset):
     """`Caltech 101 <http://www.vision.caltech.edu/Image_Datasets/Caltech101/>`_ Dataset.
 
+    .. warning::
+
+        This class needs `scipy <https://docs.scipy.org/doc/>`_ to load target files from `.mat` format.
+
     Args:
         root (string): Root directory of dataset where directory
             ``caltech101`` exists or will be saved to if download is set to True.

torchvision/datasets/svhn.py

@@ -13,6 +13,10 @@ class SVHN(VisionDataset):
     we assign the label `0` to the digit `0` to be compatible with PyTorch loss functions which
     expect the class labels to be in the range `[0, C-1]`
 
+    .. warning::
+
+        This class needs `scipy <https://docs.scipy.org/doc/>`_ to load data from `.mat` format.
+
     Args:
         root (string): Root directory of dataset where directory
             ``SVHN`` exists.