python 3.5 compat

Aluriak · Feb 27, 2020 · 01cf6a9 · 01cf6a9
1 parent 3794a64
commit 01cf6a9
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/clyngor/answers.py b/clyngor/answers.py
@@ -290,7 +290,7 @@ def _format(self, answer_set) -> dict or frozenset:
                 mapping[pred].add(args)
                 if self._group_atoms_with_arity:
                     mapping[pred, len(args)].add(args)
-                    mapping[f'{pred}/{len(args)}'].add(args)
+                    mapping['{}/{}'.format(pred, str(len(args)))].add(args)
             if self._as_pyasp:
                 return {pred: as_pyasp.TermSet(args) for pred, args in mapping.items()}
             else: