--- a/dataimport.py	Tue May 15 14:43:08 2012 +0200
+++ b/dataimport.py	Mon May 14 15:24:07 2012 +0200
@@ -182,7 +182,10 @@
     assert isinstance(row, dict)
     assert isinstance(map, list)
     for src, dest, funcs in map:
-        res[dest] = row[src]
+        try:
+            res[dest] = row[src]
+        except KeyError:
+            continue
         try:
             for func in funcs:
                 res[dest] = func(res[dest])