diff --git a/volia/data.py b/volia/data.py
index 1f46642..9694e12 100644
--- a/volia/data.py
+++ b/volia/data.py
@@ -1,13 +1,8 @@
 import argparse
-import sys
-
 from utils import SubCommandRunner
-
 import core.data
 
 
-
-
 def filter_file(file, filter, outfile):
     file_path = file
     filter_path = filter
@@ -17,13 +12,9 @@ def filter_file(file, filter, outfile):
     with open(outfile, "w") as out:
         for id_ in filter_data:
             core.data.write_line(id_, file_data[id_], out)
-        
-    
 
-    
 
 def convert(file, type_from, type):
-
     pass
 
 def utt2dur(wavscp: str, outfile: str):