From 42753edb3c93cbc2ef7a6698b88b20bd641122fe Mon Sep 17 00:00:00 2001 From: Steve Reinhardt Date: Tue, 15 Mar 2005 19:41:51 -0500 Subject: [PATCH] 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(+) 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'))