--- a/src/pyams_form/group.py Fri Jan 26 17:27:06 2018 +0100 +++ b/src/pyams_form/group.py Fri Jan 26 17:27:31 2018 +0100 @@ -153,7 +153,7 @@ def add_group(self, group): self._groups.append(group) - @property + @reify def groups(self): result = self._groups[:] others = []