did not work when piping

processing/post/addInfo.py

@@ -1,6 +1,8 @@
 #!/usr/bin/env python3
 
 import os
+import sys
+from io import StringIO
 from optparse import OptionParser
 
 import damask

processing/post/reLabel.py

@@ -2,8 +2,8 @@
 
 import os
 import sys
+from io import StringIO
 from optparse import OptionParser
-import re
 
 import damask