Fix python 2.6 compatibility issue

chimpler · May 4, 2016 · fa7ad25 · fa7ad25
1 parent c692045
commit fa7ad25
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/pyhocon/config_parser.py b/pyhocon/config_parser.py
@@ -306,7 +306,8 @@ def _fixup_self_references(config):
                             continue  # If value is present in latest version, don't do anything
                         if prop_path[0] == key:
                             if isinstance(previous_item, ConfigValues):  # We hit a dead end, we cannot evaluate
-                                raise ConfigSubstitutionException("Property {} cannot be substituted. Check for cycles.".format(substitution.variable))
+                                raise ConfigSubstitutionException("Property {variable} cannot be substituted. Check for cycles.".format(
+                                    variable=substitution.variable))
                             value = previous_item if len(prop_path) == 1 else previous_item.get(".".join(prop_path[1:]))
                             (_, _, current_item) = ConfigParser._do_substitute(substitution, value)
                     previous_item = current_item