Refactor model pruning framework

src/sdk/pynni/nni/compression/torch/pruning/__init__.py

@@ -1,8 +1,9 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT license.
 
-from .pruners import *
-from .weight_rank_filter_pruners import *
-from .activation_rank_filter_pruners import *
+from .finegrained_prunning import *
+from .structured_prunning import *
 from .apply_compression import apply_compression_results
-from .gradient_rank_filter_pruners import *
+from .one_shot import *
+from .agp import *
+from .lottery_ticket import LotteryTicketPruner