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annotate roundup/cgi/MultiMapping.py @ 3192:eb00a2fa0e0e maint-0.8 0.8.0

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pre-release stuff
author Richard Jones <richard@users.sourceforge.net>
date Wed, 16 Feb 2005 00:29:18 +0000
parents 53c600091f17
children
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1 class MultiMapping:
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2 def __init__(self, *stores):
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3 self.stores = list(stores)
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4 self.stores.reverse()
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5
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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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12 def __setitem__(self, key, val):
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13 self.stores[0][key] = val
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14
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15 _marker = []
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16
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17 def get(self, key, default=_marker):
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18 for store in self.stores:
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19 if store.has_key(key):
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20 return store[key]
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21 if default is self._marker:
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22 raise KeyError, key
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23 return default
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24
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25 def __len__(self):
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26 return len(self.items())
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27
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28 def has_key(self, key):
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29 for store in self.stores:
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30 if store.has_key(key):
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31 return 1
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32 return 0
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33
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34 def push(self, store):
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35 self.stores = [store] + self.stores
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36
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37 def pop(self):
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38 if not len(self.stores):
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39 return None
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40 store, self.stores = self.stores[0], self.stores[1:]
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41 return store
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42
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43 def keys(self):
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44 return [ _[0] for _ in self.items() ]
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45
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46 def values(self):
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47 return [ _[1] for _ in self.items() ]
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48
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49 def copy(self):
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50 copy = MultiMapping()
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51 copy.stores = [_.copy() for _ in self.stores]
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52 return copy
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53
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54 def items(self):
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55 l = []
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56 seen = {}
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57 for store in self.stores:
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58 for k, v in store.items():
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59 if not seen.has_key(k):
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60 l.append((k, v))
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61 seen[k] = 1
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62 return l
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63
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