Mercurial > boomslang

changeset 498:168e9424fe91

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Perform a deepcopy of INITIAL_DATA to allow mutable initial data to be used safely.
author Simon Cross <hodgestar+bzr@gmail.com>
date Mon, 30 Aug 2010 00:16:14 +0200
parents 0b33a502660c
children cfd9c2bb4474
files gamelib/state.py
diffstat 1 files changed, 5 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/gamelib/state.py	Sun Aug 29 21:35:05 2010 +0200
+++ b/gamelib/state.py	Mon Aug 30 00:16:14 2010 +0200
@@ -1,5 +1,7 @@
 """Utilities and base classes for dealing with scenes."""
 
+import copy
+
 from albow.resource import get_image, get_font
 from albow.utils import frame_rect
 from widgets import BoomLabel
@@ -236,7 +238,9 @@
     def __init__(self):
         self.data = {}
         if self.INITIAL_DATA:
-            self.data.update(self.INITIAL_DATA)
+            # deep copy of INITIAL_DATA allows lists, sets and
+            # other mutable types to safely be used in INITIAL_DATA
+            self.data.update(copy.deepcopy(self.INITIAL_DATA))
 
     def set_data(self, key, value):
         self.data[key] = value