changeset:   99433:b3a0765671d6
user:        Brett Cannon <brett@python.org>
date:        Fri Dec 04 15:19:42 2015 -0800
files:       Lib/importlib/util.py Misc/NEWS
description:
Issue #25771: Tweak ValueError message when package isn't specified
for importlib.util.resolve_name() but is needed.

Thanks to Martin Panter for the bug report.


diff -r 0259c2c555fb -r b3a0765671d6 Lib/importlib/util.py
--- a/Lib/importlib/util.py	Fri Dec 04 14:52:07 2015 -0800
+++ b/Lib/importlib/util.py	Fri Dec 04 15:19:42 2015 -0800
@@ -22,8 +22,8 @@
     if not name.startswith('.'):
         return name
     elif not package:
-        raise ValueError('{!r} is not a relative name '
-                         '(no leading dot)'.format(name))
+        raise ValueError(f'no package specified for {repr(name)} '
+                         '(required for relative module names)')
     level = 0
     for character in name:
         if character != '.':
diff -r 0259c2c555fb -r b3a0765671d6 Misc/NEWS
--- a/Misc/NEWS	Fri Dec 04 14:52:07 2015 -0800
+++ b/Misc/NEWS	Fri Dec 04 15:19:42 2015 -0800
@@ -109,6 +109,9 @@
 Library
 -------
 
+- Issue #25771: Tweak the exception message for importlib.util.resolve_name()
+  when 'package' isn't specified but necessary.
+
 - Issue #6478: _strptime's regexp cache now is reset after changing timezone
   with time.tzset().