_argparse: add ArgumentParser.error()

diff --git a/pym/portage/util/_argparse.py b/pym/portage/util/_argparse.py
index a44afed7b82ff167c61217f13eded3642df6312c..2f915dc55bade7003ceef61104ec638302f9b069 100644 (file)
--- a/pym/portage/util/_argparse.py
+++ b/pym/portage/util/_argparse.py
@@ -19,6 +19,7 @@ except ImportError:
                        self.add_argument = parser.add_option
                        self.parse_known_args = parser.parse_args
                        self.parse_args = parser.parse_args
+                       self.error = parser.error
 
                def add_argument_group(self, title=None, **kwargs):
                        optiongroup = OptionGroup(self._parser, title, **kwargs)