Added atexit command to obi import, obi uniq and obi less

python/obitools3/commands/import.pyx

@@ -12,6 +12,7 @@ from obitools3.dms.view.view cimport View
 from obitools3.dms.view.typed_view.view_NUC_SEQS cimport View_NUC_SEQS
 from obitools3.dms.column.column cimport Column
 from obitools3.dms.obiseq cimport Nuc_Seq
+from obitools3.dms import DMS
 
 from obitools3.utils cimport tobytes, \
                              get_obitype, \
@@ -82,6 +83,7 @@ def run(config):
     cdef   bytes       NA_value
     global             obi_errno
         
+    DMS.obi_atexit()
     
     logger("info","obi import : imports file into an DMS")
     
@@ -238,6 +240,6 @@ def run(config):
     print("\n")
     print(view.__repr__())
   
-    input[0].close()    # TODO
+    input[0].close()    # TODO ?
     output[0].close()