diff --git a/torch_pruning/pruner/importance.py b/torch_pruning/pruner/importance.py
index 75046ae..9094641 100644
--- a/torch_pruning/pruner/importance.py
+++ b/torch_pruning/pruner/importance.py
@@ -37,7 +37,6 @@ class Importance(abc.ABC):
 
         It should accept a group as inputs, and return a 1-D tensor with the same length as the number of channels.
         All groups must be pruned simultaneously and thus their importance should be accumulated across channel groups.
-        Just ignore the ch_groups if you are not familar with grouping.
 
         Example:
             ```python
@@ -362,7 +361,7 @@ def __call__(self, group, **kwargs):
 
                 # repeat importance for group convolutions
                 if prune_fn == function.prune_conv_in_channels and layer.groups != layer.in_channels and layer.groups != 1:
-                    local_imp = local_imp.repeat(ch_groups)
+                    local_imp = local_imp.repeat(layer.groups)
                 local_imp = local_imp[idxs]
                 similar_matrix = torch.cdist(local_imp.unsqueeze(0), local_imp.unsqueeze(0), p=2).squeeze(0)
                 similar_sum = torch.sum(torch.abs(similar_matrix), dim=0)
@@ -582,7 +581,7 @@ def adjust_fisher(self, group, idxs):
                     indices_to_keep = list(range(self.Fisher[layer].shape[1]))
                     for idx in idxs:
                         indices_to_keep = [i for i in indices_to_keep if not (idx*kernel_size <= i < (idx+1)*kernel_size)]
-                    self.Fisher[layer] = torch.index_select(self.Fisher[layer], 1, torch.tensor(indices_to_keep).to(self.Fisher[layer].device))
+                    self.Fisher[layer] = torch.index_select(self.Fisher[layer], 1, torch.LongTensor(indices_to_keep).to(self.Fisher[layer].device))
             
 
     def _rm_hooks(self, model):
@@ -615,7 +614,7 @@ def _clear_buffer(self):
         self.steps = 0
     
     @torch.no_grad()
-    def __call__(self, group, ch_groups=1):
+    def __call__(self, group):
         group_imp = []
         group_idxs = []
         for i, (dep, idxs) in enumerate(group):