Sparsity docs update (#1590)

docs/source/api_ref_sparsity.rst

@@ -12,7 +12,7 @@ torchao.sparsity
 
     WandaSparsifier
     PerChannelNormObserver
-    apply_sparse_semi_structured
     apply_fake_sparsity
-
-
+    sparsify_
+    semi_sparse_weight
+    int8_dynamic_activation_int8_semi_sparse_weight

torchao/sparsity/sparse_api.py

@@ -43,7 +43,7 @@ def sparsify_(
     apply_tensor_subclass: Callable[[torch.Tensor], torch.Tensor],
     filter_fn: Optional[Callable[[torch.nn.Module, str], bool]] = None,
 ) -> torch.nn.Module:
-    """Convert the weight of linear modules in the model with `apply_tensor_subclass`
+    """Convert the weight of linear modules in the model with `apply_tensor_subclass`.
     This function is essentially the same as quantize, put for sparsity subclasses.
 
     Currently, we support three options for sparsity:
@@ -54,26 +54,26 @@ def sparsify_(
     Args:
         model (torch.nn.Module): input model
         apply_tensor_subclass (Callable[[torch.Tensor], torch.Tensor]): function that convert a floating point Tensor to a (sparsified) tensor subclass instance (e.g. affine quantized tensor instance)
-        filter_fn (Optional[Callable[[torch.nn.Module, str], bool]]): function that takes a nn.Module instance and fully qualified name of the module, returns True if we want to run `apply_tensor_subclass` on
-        the weight of the module
+        filter_fn (Optional[Callable[[torch.nn.Module, str], bool]]): function that takes a nn.Module instance and fully qualified name of the module, returns True if we want to run `apply_tensor_subclass` on the weight of the module
 
-    Example::
-        import torch
-        import torch.nn as nn
-        from torchao.sparsity import sparsify_
+    **Example:**
+    ::
+            import torch
+            import torch.nn as nn
+            from torchao.sparsity import sparsify_
 
-        def filter_fn(module: nn.Module, fqn: str) -> bool:
-            return isinstance(module, nn.Linear)
+            def filter_fn(module: nn.Module, fqn: str) -> bool:
+                return isinstance(module, nn.Linear)
 
-        m = nn.Sequential(nn.Linear(32, 1024), nn.Linear(1024, 32))
+            m = nn.Sequential(nn.Linear(32, 1024), nn.Linear(1024, 32))
 
-        # for 2:4 sparsity
-        from torchao.sparse_api import semi_sparse_weight
-        m = sparsify_(m, semi_sparse_weight(), filter_fn)
+            # for 2:4 sparsity
+            from torchao.sparse_api import semi_sparse_weight
+            m = sparsify_(m, semi_sparse_weight(), filter_fn)
 
-        # for int8 dynamic quantization + 2:4 sparsity
-        from torchao.dtypes import SemiSparseLayout
-        m = quantize_(m, int8_dynamic_activation_int8_weight(layout=SemiSparseLayout), filter_fn)
+            # for int8 dynamic quantization + 2:4 sparsity
+            from torchao.dtypes import SemiSparseLayout
+            m = quantize_(m, int8_dynamic_activation_int8_weight(layout=SemiSparseLayout), filter_fn)
     """
     _replace_with_custom_fn_if_matches_filter(
         model,