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## Amazon S3 manager
## Author: Michal Ludvig <michal@logix.cz>
##         http://www.logix.cz/michal
## License: GPL Version 2

00006 class BidirMap(object):
      def __init__(self, **map):
            self.k2v = {}
            self.v2k = {}
            for key in map:
                  self.__setitem__(key, map[key])

      def __setitem__(self, key, value):
            if self.v2k.has_key(value):
                  if self.v2k[value] != key:
                        raise KeyError("Value '"+str(value)+"' already in use with key '"+str(self.v2k[value])+"'")
            except KeyError:
            self.k2v[key] = value
            self.v2k[value] = key

      def __getitem__(self, key):
            return self.k2v[key]

      def __str__(self):
            return self.v2k.__str__()

      def getkey(self, value):
            return self.v2k[value]
      def getvalue(self, key):
            return self.k2v[key]

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