Mercurial > p > roundup > code
comparison roundup/cgi/MultiMapping.py @ 2162:53c600091f17
fixed MultiMapping
| author | Richard Jones <richard@users.sourceforge.net> |
|---|---|
| date | Tue, 30 Mar 2004 06:35:33 +0000 |
| parents | 55ab0c5b49f9 |
| children |
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| 2161:98656054ccfa | 2162:53c600091f17 |
|---|---|
| 1 import operator | |
| 2 | |
| 3 class MultiMapping: | 1 class MultiMapping: |
| 4 def __init__(self, *stores): | 2 def __init__(self, *stores): |
| 5 self.stores = list(stores) | 3 self.stores = list(stores) |
| 4 self.stores.reverse() | |
| 5 | |
| 6 def __getitem__(self, key): | 6 def __getitem__(self, key): |
| 7 for store in self.stores: | 7 for store in self.stores: |
| 8 if store.has_key(key): | 8 if store.has_key(key): |
| 9 return store[key] | 9 return store[key] |
| 10 raise KeyError, key | 10 raise KeyError, key |
| 11 | |
| 12 def __setitem__(self, key, val): | |
| 13 self.stores[0][key] = val | |
| 14 | |
| 11 _marker = [] | 15 _marker = [] |
| 16 | |
| 12 def get(self, key, default=_marker): | 17 def get(self, key, default=_marker): |
| 13 for store in self.stores: | 18 for store in self.stores: |
| 14 if store.has_key(key): | 19 if store.has_key(key): |
| 15 return store[key] | 20 return store[key] |
| 16 if default is self._marker: | 21 if default is self._marker: |
| 17 raise KeyError, key | 22 raise KeyError, key |
| 18 return default | 23 return default |
| 24 | |
| 19 def __len__(self): | 25 def __len__(self): |
| 20 return reduce(operator.add, [len(x) for x in stores], 0) | 26 return len(self.items()) |
| 27 | |
| 28 def has_key(self, key): | |
| 29 for store in self.stores: | |
| 30 if store.has_key(key): | |
| 31 return 1 | |
| 32 return 0 | |
| 33 | |
| 21 def push(self, store): | 34 def push(self, store): |
| 22 self.stores.append(store) | 35 self.stores = [store] + self.stores |
| 36 | |
| 23 def pop(self): | 37 def pop(self): |
| 24 return self.stores.pop() | 38 if not len(self.stores): |
| 39 return None | |
| 40 store, self.stores = self.stores[0], self.stores[1:] | |
| 41 return store | |
| 25 | 42 |
| 43 def keys(self): | |
| 44 return [ _[0] for _ in self.items() ] | |
| 45 | |
| 46 def values(self): | |
| 47 return [ _[1] for _ in self.items() ] | |
| 48 | |
| 49 def copy(self): | |
| 50 copy = MultiMapping() | |
| 51 copy.stores = [_.copy() for _ in self.stores] | |
| 52 return copy | |
| 53 | |
| 54 def items(self): | |
| 55 l = [] | |
| 56 seen = {} | |
| 57 for store in self.stores: | |
| 58 for k, v in store.items(): | |
| 59 if not seen.has_key(k): | |
| 60 l.append((k, v)) | |
| 61 seen[k] = 1 | |
| 62 return l | |
| 63 |