commit 8750dfe09eaec24231e19962d17d171c323794ad
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Fri Sep 13 02:45:27 2019 -0700
committer GitHub <noreply@github.com> Fri Sep 13 02:45:27 2019 -0700
tree 9db6a8ce18c8b3e012f22bb6d7915c93e3e4725e
parent 664d56a52eb5b98ac24b2d0cd4a080ffd49fd93d

bpo-37785: Fix xgettext warning in argparse (GH-15161)

(cherry picked from commit 42671aea2db6cbc54369617da0fd3545048e0a45)

Co-authored-by: Jakub Kulík <Kulikjak@gmail.com>

Lib/argparse.py

diff --git a/Lib/argparse.py b/Lib/argparse.py
index 456ec8b..e590225 100644
--- a/Lib/argparse.py
+++ b/Lib/argparse.py
@@ -1214,8 +1214,9 @@
             return open(string, self._mode, self._bufsize, self._encoding,
                         self._errors)
         except OSError as e:
-            message = _("can't open '%s': %s")
-            raise ArgumentTypeError(message % (string, e))
+            args = {'filename': string, 'error': e}
+            message = _("can't open '%(filename)s': %(error)s")
+            raise ArgumentTypeError(message % args)
 
     def __repr__(self):
         args = self._mode, self._bufsize

Misc/NEWS.d/next/Library/2019-08-07-14-49-22.bpo-37785.y7OlT8.rst

diff --git a/Misc/NEWS.d/next/Library/2019-08-07-14-49-22.bpo-37785.y7OlT8.rst b/Misc/NEWS.d/next/Library/2019-08-07-14-49-22.bpo-37785.y7OlT8.rst
new file mode 100644
index 0000000..2d3aa4f
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-08-07-14-49-22.bpo-37785.y7OlT8.rst
@@ -0,0 +1 @@
+Fix xgettext warnings in :mod:`argparse`.