Cython: added full handling of NA strings when importing files

python/obitools3/commands/import.pyx

@@ -83,7 +83,6 @@ def run(config):
     cdef   list        old_elements_names
     cdef   list        new_elements_names
     cdef   ProgressBar pb
-    cdef   bytes       NA_value
     global             obi_errno
         
     DMS.obi_atexit()
@@ -122,9 +121,7 @@ def run(config):
     pb = ProgressBar(10000000, config, seconde=5)   # TODO should be number of records in file
     
     entries = input[1]
-    
-    NA_value = tobytes(config['obi']['inputnastring'])
-    
+        
     NUC_SEQS_view = False
     if isinstance(output[1], View) :
         view = output[1]
@@ -169,11 +166,7 @@ def run(config):
                 value = entry[tag]
                 if tag == b"taxid":
                     tag = b"TAXID"
-                
-                # Check NA value
-                if value == NA_value :
-                    value = None
-                 
+                                 
                 if tag not in dcols :
                      
                     value_type = type(value)