head: added output format options

python/obitools3/commands/head.pyx

@@ -8,6 +8,7 @@ from obitools3.apps.optiongroups import addMinimalInputOption, addMinimalOutputO
 from obitools3.dms.view import RollbackException
 from obitools3.apps.config import logger
 from obitools3.utils cimport str2bytes
+from obitools3.apps.optiongroups import addExportOutputOption
 
 import time
 import sys
@@ -23,6 +24,7 @@ def addOptions(parser):
     
     addMinimalInputOption(parser)
     addMinimalOutputOption(parser)
+    addExportOutputOption(parser)
     addNoProgressBarOption(parser)
 
     group=parser.add_argument_group('obi head specific options')