in subsetAssignation.py : supress the sterrr, and redirect the message

to logging

workflows/components/subsetAssignation.py

@@ -16,6 +16,7 @@
 #
 
 import os, sys
+import logging
 from subprocess import Popen, PIPE
 
 from jflow.utils import get_argument_pattern
@@ -96,7 +97,7 @@ class SubsetAssignation (Analysis):
         self.use_index = "true"
         if not os.path.exists( self.databank + ".00.idx" ) :
             self.use_index = "false"
-            sys.stderr.write("[WARNING] " + self.__class__.__name__ + " works more quickly with megablast index.\n")
+            logging.getLogger("SubsetAssignation").warn("would work more quickly with megablast index")
         
         if group_prefix == None :
             self.add_parameter_list("group_prefixes", "group_prefix", default=list(map(os.path.basename, self.get_outputs('{basename_woext}', self.sequence_files))))