From 42753edb3c93cbc2ef7a6698b88b20bd641122fe Mon Sep 17 00:00:00 2001
From: Steve Reinhardt <stever@eecs.umich.edu>
Date: Tue, 15 Mar 2005 19:41:51 -0500
Subject: Add a comment to smartdict.py.
python/m5/smartdict.py:
Add a comment explaining why this actually works.
--HG--
extra : convert_revision : 39cbde547f4bf6cf626ab1c0b6ef56a5788b09b8
---
python/m5/smartdict.py | 6 ++++++
1 file changed, 6 insertions(+)
(limited to 'python/m5/smartdict.py')
diff --git a/python/m5/smartdict.py b/python/m5/smartdict.py
index 4ea8210d3..1ba5d8410 100644
--- a/python/m5/smartdict.py
+++ b/python/m5/smartdict.py
@@ -74,6 +74,12 @@ class SmartDict(dict):
return other / self.convert(other)
+ # __getitem__ uses dict.get() to return 'False' if the key is not
+ # found (rather than raising KeyError). Note that this does *not*
+ # set the key's value to 'False' in the dict, so that even after
+ # we call env['foo'] we still get a meaningful answer from "'foo'
+ # in env" (which calls dict.__contains__, which we do not
+ # override).
def __getitem__(self, key):
return self.Proxy(dict.get(self, key, 'False'))
--
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