--- a/rtags.py	Thu Apr 23 16:10:17 2009 +0200
+++ b/rtags.py	Thu Apr 23 16:11:30 2009 +0200
@@ -17,21 +17,21 @@
     should use rtags / etype_rtags / add_rtag api. Otherwise, a single tag is
     associated to each key, and you should use rtag / etype_rtag / set_rtag api.
     """
-    
+
     def __init__(self, use_set=False):
         self.use_set = use_set
         self._tagdefs = {}
-        
+
     def set_rtag(self, tag, rtype, role, stype='*', otype='*'):
         assert not self.use_set
         assert role in ('subject', 'object'), role
         self._tagdefs[(str(rtype), role, str(stype), str(otype))] = tag
-        
+
     def del_rtag(self, rtype, role, stype='*', otype='*'):
         assert not self.use_set
         assert role in ('subject', 'object'), role
         del self._tagdefs[(str(rtype), role, str(stype), str(otype))]
-        
+
     def rtag(self, rtype, role, stype='*', otype='*'):
         assert not self.use_set
         for key in reversed(self._get_keys(rtype, role, stype, otype)):
@@ -40,18 +40,18 @@
             except KeyError:
                 continue
         return None
-        
+
     def etype_rtag(self, etype, rtype, role, ttype='*'):
         if role == 'subject':
             return self.rtag(rtype, role, etype, ttype)
         return self.rtag(rtype, role, ttype, etype)
-        
+
     def add_rtag(self, tag, rtype, role, stype='*', otype='*'):
         assert self.use_set
         assert role in ('subject', 'object'), role
         rtags = self._tagdefs.setdefault((rtype, role, stype, otype), set())
         rtags.add(tag)
-        
+
     def rtags(self, rtype, role, stype='*', otype='*'):
         assert self.use_set
         rtags = set()
@@ -61,13 +61,13 @@
             except KeyError:
                 continue
         return rtags
-        
+
     def etype_rtags(self, etype, rtype, role, ttype='*'):
         if role == 'subject':
             return self.rtags(rtype, role, etype, ttype)
         return self.rtags(rtype, role, ttype, etype)
 
-    def _get_keys(self, rtype, role, stype, otype): 
+    def _get_keys(self, rtype, role, stype, otype):
         assert role in ('subject', 'object'), role
         keys = [(rtype, role, '*', '*'),
                 (rtype, role, '*', otype),
@@ -78,9 +78,9 @@
             if stype == '*':
                 keys.remove((rtype, role, '*', otype))
             if otype == '*':
-                keys.remove((rtype, role, stype, '*'))            
+                keys.remove((rtype, role, stype, '*'))
         return keys
-    
+
     # dict compat
     def __getitem__(self, key):
         if isinstance(key, basestring):