[Checkins] SVN: Sandbox/faassen/iface/src/iface/mapping.py Avoid creating a slice by using a list from the start and popping

[Martijn Faassen]

Log message for revision 107758:
  Avoid creating a slice by using a list from the start and popping
  the last key off.
  

Changed:
  U   Sandbox/faassen/iface/src/iface/mapping.py

-=-
Modified: Sandbox/faassen/iface/src/iface/mapping.py
===================================================================
--- Sandbox/faassen/iface/src/iface/mapping.py	2010-01-07 00:11:03 UTC (rev 107757)
+++ Sandbox/faassen/iface/src/iface/mapping.py	2010-01-07 00:20:43 UTC (rev 107758)
@@ -50,22 +50,24 @@
         
     def __setitem__(self, key, value):
         arity = MapKey(len(key))
-        key = (arity,) + tuple(key)
+        key = [arity] + list(key)
+        last_key = key.pop()
         map = self._by_arity
-        for k in key[:-1]:
+        for k in key:
            submap = dict(map).get(k)
            if submap is None:
                submap = map[k] = Map()
            map = submap
-        map[key[-1]] = value
+        map[last_key] = value
 
     def __delitem__(self, key):
         arity = MapKey(len(key))
-        key = (arity,) + tuple(key)
+        key = [arity] + list(key)
+        last_key = key.pop()
         map = self._by_arity
-        for k in key[:-1]:
+        for k in key:
             map = dict(map)[k]
-        del map[key[-1]]
+        del map[last_key]
 
     def __getitem__(self, key):
         arity = MapKey(len(key))