Allow Sort nodes as child of ListNodeOperator too.

Author: progval

ppp_datamodel/nodes/list_operators.py

@@ -15,9 +15,9 @@ class ListNodeOperator(AbstractNode):
 
     def _check_attributes(self, attributes):
         super(ListNodeOperator, self)._check_attributes(attributes)
-        if not isinstance(attributes['list'], List):
+        if not isinstance(attributes['list'], (List, Sort)):
             raise TypeError('The “list” argument of the %s constructor '
-                            'should be a List node, not %r' %
+                            'should be a List or Sort node, not %r' %
                             (self.__class__.__name__, attributes['list']))
 
 class ListOperator(AbstractNode):

setup.py

@@ -4,7 +4,7 @@
 
 setup(
     name='ppp_datamodel',
-    version='0.5.18',
+    version='0.5.19',
     description='Data model for the Projet Pensées Profondes.',
     url='https://github.com/ProjetPP/PPP-datamodel-Python',
     author='Valentin Lorentz',