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annotate roundup/cgi/MultiMapping.py @ 1073:cf30c6cdca02

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More documentation. Simplified the "klass", "item" and "*classname*" variables into "context.
author Richard Jones <richard@users.sourceforge.net>
date Mon, 09 Sep 2002 00:45:06 +0000
parents 55ab0c5b49f9
children 53c600091f17
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1 import operator
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2
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3 class MultiMapping:
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4 def __init__(self, *stores):
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5 self.stores = list(stores)
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6 def __getitem__(self, key):
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7 for store in self.stores:
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8 if store.has_key(key):
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9 return store[key]
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10 raise KeyError, key
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11 _marker = []
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12 def get(self, key, default=_marker):
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13 for store in self.stores:
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14 if store.has_key(key):
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15 return store[key]
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16 if default is self._marker:
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17 raise KeyError, key
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18 return default
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19 def __len__(self):
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20 return reduce(operator.add, [len(x) for x in stores], 0)
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21 def push(self, store):
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22 self.stores.append(store)
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23 def pop(self):
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24 return self.stores.pop()
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25
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