diff --git a/python/obitools3/commands/grep.pyx b/python/obitools3/commands/grep.pyx
index 96f7768..ff656f5 100644
--- a/python/obitools3/commands/grep.pyx
+++ b/python/obitools3/commands/grep.pyx
@@ -1,100 +1,96 @@
-# from obitools3.apps.progress cimport ProgressBar  # @UnresolvedImport
-# from obitools3.dms.dms import OBIDMS       # TODO cimport doesn't work
-# #, OBIView, OBIView_line_selection    # TODO cimport doesn't work
-# 
-# from functools import reduce
-# import time
-# 
-# __title__="Grep view lines that match the given predicates"
-# 
+#cython: language_level=3
 
+from obitools3.apps.progress cimport ProgressBar  # @UnresolvedImport
+from obitools3.dms.dms import DMS       # TODO cimport doesn't work
+from obitools3.dms.view.view import View, Line_selection    # TODO cimport doesn't work
+ 
+from functools import reduce
+import time
+ 
+__title__="Grep view lines that match the given predicates"
+ 
+default_config = {   'inputview'    : None,
+                     'outputview'   : None
+                 }
+ 
+def addOptions(parser):
+ 
+    # TODO put this common group somewhere else but I don't know where
+    group=parser.add_argument_group('DMS and view options')
+ 
+    group.add_argument('--default-dms','-d', 
+                       action="store", dest="obi:defaultdms",
+                       metavar='<DMS NAME>',
+                       default=None,
+                       type=str,
+                       help="Name of the default DMS for reading and writing data.")
+ 
+    group.add_argument('--input-view','-i',
+                       action="store", dest="obi:inputview",
+                       metavar='<INPUT VIEW NAME>',
+                       default=None,
+                       type=str,
+                       help="Name of the input view, either raw if the view is in the default DMS,"
+                            " or in the form 'dms:view' if it is in another DMS.")
+ 
+    group.add_argument('--output-view','-o',
+                       action="store", dest="obi:outputview",
+                       metavar='<OUTPUT VIEW NAME>',
+                       default=None,
+                       type=str,
+                       help="Name of the output view, either raw if the view is in the default DMS,"
+                            " or in the form 'dms:view' if it is in another DMS.")
+ 
+ 
+    group=parser.add_argument_group('obi grep specific options')
+ 
+    group.add_argument('--predicate','-p',
+                       action="append", dest="grep:predicates",
+                       metavar='<PREDICATE>',
+                       default=None,
+                       type=str,
+                       help="Grep lines that match the given python expression on <line> or <sequence>.")
+ 
+     
 def run(config):
-    pass
-
-# default_config = {   'inputview'    : None,
-#                      'outputview'   : None
-#                  }
-# 
-# def addOptions(parser):
-# 
-#     # TODO put this common group somewhere else but I don't know where
-#     group=parser.add_argument_group('DMS and view options')
-# 
-#     group.add_argument('--default-dms','-d', 
-#                        action="store", dest="obi:defaultdms",
-#                        metavar='<DMS NAME>',
-#                        default=None,
-#                        type=str,
-#                        help="Name of the default DMS for reading and writing data.")
-# 
-#     group.add_argument('--input-view','-i',
-#                        action="store", dest="obi:inputview",
-#                        metavar='<INPUT VIEW NAME>',
-#                        default=None,
-#                        type=str,
-#                        help="Name of the input view, either raw if the view is in the default DMS,"
-#                             " or in the form 'dms:view' if it is in another DMS.")
-# 
-#     group.add_argument('--output-view','-o',
-#                        action="store", dest="obi:outputview",
-#                        metavar='<OUTPUT VIEW NAME>',
-#                        default=None,
-#                        type=str,
-#                        help="Name of the output view, either raw if the view is in the default DMS,"
-#                             " or in the form 'dms:view' if it is in another DMS.")
-# 
-# 
-#     group=parser.add_argument_group('obi grep specific options')
-# 
-#     group.add_argument('--predicate','-p',
-#                        action="append", dest="grep:predicates",
-#                        metavar='<PREDICATE>',
-#                        default=None,
-#                        type=str,
-#                        help="Grep lines that match the given python expression on <line> or <sequence>.")
-# 
-#     
-# def run(config):
-#     
-#     # Open DMS
-#     d = OBIDMS(config['obi']['defaultdms'])
-#     
-#     # Open input view 1
-# #     iview = d.open_view(config['obi']['inputview'])
-# #     
-# #     # Initialize the progress bar
-# #     pb = ProgressBar(len(iview), config, seconde=5)
-# #         
-# #     # Apply filter
-# #     selection = OBIView_line_selection(iview)
-# #     for i in range(len(iview)) :
-# #         pb(i)
-# #         line = iview[i]
-# #                 
-# #         loc_env = {'sequence': line, 'line': line}      # TODO add taxonomy
-# #         
-# #         good = (reduce(lambda bint x, bint y: x and y,
-# #                 (bool(eval(p, loc_env, line))
-# #                 for p in config['grep']['predicates']), True))
-# #         
-# #         if good :
-# #             selection.append(i)
-# #          
-# #     # Create output view with the line selection
-# #     oview = d.clone_view_with_line_selection(config['obi']['outputview'], selection, comments="obi grep: "+str(config['grep']['predicates'])+"\n")
-# # 
-# #     #print("\n")
-# #     #print(repr(oview))
-# # 
-# #     iview.close()
-# #     oview.close()
-#     d.close()
-#     
-#     
-#     
-# 
-#     
-#     
-#     
-#     
-#         
\ No newline at end of file
+     
+    # Open DMS
+    d = DMS.open(config['obi']['defaultdms'])
+     
+    # Open input view 1
+    iview = View.open(d, config['obi']['inputview'])
+     
+    # Initialize the progress bar
+    pb = ProgressBar(len(iview), config, seconde=5)
+         
+    # Apply filter
+    selection = Line_selection(iview)
+    for i in range(len(iview)) :
+        pb(i)
+        line = iview[i]
+                 
+        loc_env = {'sequence': line, 'line': line}      # TODO add taxonomy
+         
+        good = (reduce(lambda bint x, bint y: x and y,
+                (bool(eval(p, loc_env, line))
+                for p in config['grep']['predicates']), True))
+         
+        if good :
+            selection.append(i)
+    
+    # Create output view with the line selection
+    oview = selection.materialize(config['obi']['outputview'], comments="obi grep: "+str(config['grep']['predicates'])+"\n")
+ 
+    print("\n")
+    print(repr(oview))
+ 
+    d.close()
+     
+     
+     
+ 
+     
+     
+     
+     
+         
\ No newline at end of file