better handling of unicode paths in errors

git-svn-id: http://pyfilesystem.googlecode.com/svn/trunk@277 67cdc799-7952-0410-af00-57a81ceafa0f

1 files changed, 6 insertions, 1 deletions

diff --git a/fs/errors.py b/fs/errors.py
index 4e52711..5bab395 100644
--- a/fs/errors.py
+++ b/fs/errors.py
@@ -31,7 +31,12 @@ class FSError(Exception):
         self.details = details
 
     def __str__(self):
-        return unicode(self).encode(sys.getfilesystemencoding())
+        keys = {}
+        for k,v in self.__dict__.iteritems():
+            if isinstance(v,unicode):
+                v = v.encode(sys.getfilesystemencoding())
+            keys[k] = v
+        return str(self.msg % keys)
 
     def __unicode__(self):
         keys = dict((k,v) for k,v in self.__dict__.iteritems())