Update docstrings for testing object type

Add docstring for `is_storage()` and `is_tensor()`

Author: ronrest

torch/__init__.py

@@ -75,10 +75,20 @@ def typename(o):
 
 
 def is_tensor(obj):
+ r"""Returns True if `obj` is a pytorch tensor.
+
+ Args:
+ obj (Object): Object to test
+ """
  return obj.__class__ in _tensor_classes
 
 
 def is_storage(obj):
+ r"""Returns True if `obj` is a pytorch storage object.
+
+ Args:
+ obj (Object): Object to test
+ """
  return obj.__class__ in _storage_classes