entirely reworked cython wrapper

python/obitools3/obidms/_obidmscolumn_int.pyx

@@ -0,0 +1,48 @@
+#cython: language_level=3
+
+from .capi.obidmscolumn cimport obi_close_column,\
+                                obi_truncate_and_close_column, \
+                                obi_column_get_obiint_with_elt_name, \
+                                obi_column_set_obiint_with_elt_name
+from .capi.obierrno     cimport obi_errno
+from .capi.obitypes     cimport OBIInt_NA
+
+from obitools3.utils cimport str2bytes
+
+from cpython.int cimport PyInt_FromLong
+
+from ._obidms cimport OBIDMS_column
+
+
+cdef class OBIDMS_column_int(OBIDMS_column):
+
+    cpdef object get_item(self, size_t line_nb, str element_name):
+        cdef obiint_t value
+        cdef object result
+        value = obi_column_get_obiint_with_elt_name(self.pointer, line_nb, str2bytes(element_name))
+        if obi_errno > 0 :
+            raise IndexError(line_nb, element_name)
+        if value == OBIInt_NA :
+            result = None
+        else :
+            result = PyInt_FromLong(value)
+        return result
+    
+    cpdef set_item(self, size_t line_nb, str element_name, obiint_t value):
+        raise Exception("Column is read-only")
+
+    cpdef close(self):
+        if obi_close_column(self.pointer) < 0 :
+            raise Exception("Problem closing a column")
+                  
+
+cdef class OBIDMS_column_int_writable(OBIDMS_column_int):     
+
+    cpdef set_item(self, size_t line_nb, str element_name, obiint_t value):
+        if obi_column_set_obiint_with_elt_name(self.pointer, line_nb, str2bytes(element_name), value) < 0:
+            raise Exception("Problem setting a value in a column")
+
+    cpdef close(self):
+        if obi_truncate_and_close_column(self.pointer) < 0 :
+            raise Exception("Problem closing a column")
+