--- a/dataimport/deprecated.py	Mon Nov 30 10:18:22 2015 +0100
+++ b/dataimport/deprecated.py	Mon Nov 30 11:09:51 2015 +0100
@@ -294,7 +294,7 @@
         """Given an entity type and eid, updates the corresponding fake entity with specified
         attributes and inlined relations.
         """
-        assert eid in self.types[etype], 'Trying to update with wrong type {}'.format(etype)
+        assert eid in self.types[etype], 'Trying to update with wrong type %s' % etype
         data = self.eids[eid]
         data.update(kwargs)
 

--- a/dataimport/importer.py	Mon Nov 30 10:18:22 2015 +0100
+++ b/dataimport/importer.py	Mon Nov 30 11:09:51 2015 +0100
@@ -83,15 +83,15 @@
 
     def __init__(self, cnx, source=None):
         self.cnx = cnx
-        self._rql_template = 'Any S,O WHERE S {} O'
+        self._rql_template = 'Any S,O WHERE S %s O'
         self._kwargs = {}
         if source is not None:
-            self._rql_template += ', S cw_source SO, O cw_source SO, SO eid %(s)s'
+            self._rql_template += ', S cw_source SO, O cw_source SO, SO eid %%(s)s'
             self._kwargs['s'] = source.eid
 
     def __getitem__(self, rtype):
         """Return a set of (subject, object) eids already related by `rtype`"""
-        rql = self._rql_template.format(rtype)
+        rql = self._rql_template % rtype
         return set(tuple(x) for x in self.cnx.execute(rql, self._kwargs))
 
 

--- a/dataimport/stores.py	Mon Nov 30 10:18:22 2015 +0100
+++ b/dataimport/stores.py	Mon Nov 30 11:09:51 2015 +0100
@@ -103,7 +103,7 @@
         and inlined relations.
         """
         entity = self._cnx.entity_from_eid(eid)
-        assert entity.cw_etype == etype, 'Trying to update with wrong type {}'.format(etype)
+        assert entity.cw_etype == etype, 'Trying to update with wrong type %s' % etype
         # XXX some inlined relations may already exists
         entity.cw_set(**kwargs)