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class Options(dict):
def __init__(self, *args, **kw):
dict.__init__(self, *args, **kw)
self.readKeys = set()
def __getitem__(self, key):
self.readKeys.add(key)
return self.get(key,None)
def _unreadKeys(self):
"""return unused keys"""
return set([a for a in self if a not in self.readKeys])
unreadKeys = property(_unreadKeys)
##########################
if __name__ == "__main__":
import unittest
class TestOptions(unittest.TestCase):
def testOptions(self):
a = Options()
a["A"] = 3
a["B"] = 3
a["A"]
self.assertEqual(a.readKeys, set(["A"]))
self.assertEqual(a.unreadKeys, set(["B"]))
unittest.main()
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