Mercurial > repos > devteam > flanking_features
diff utils/odict.py @ 0:e928e029f6eb draft
Imported from capsule None
author | devteam |
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date | Tue, 01 Apr 2014 09:13:13 -0400 |
parents | |
children | 850c05b9af00 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/utils/odict.py Tue Apr 01 09:13:13 2014 -0400 @@ -0,0 +1,85 @@ +""" +Ordered dictionary implementation. +""" + +from UserDict import UserDict + +class odict(UserDict): + """ + http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/107747 + + This dictionary class extends UserDict to record the order in which items are + added. Calling keys(), values(), items(), etc. will return results in this + order. + """ + def __init__( self, dict = None ): + self._keys = [] + UserDict.__init__( self, dict ) + + def __delitem__( self, key ): + UserDict.__delitem__( self, key ) + self._keys.remove( key ) + + def __setitem__( self, key, item ): + UserDict.__setitem__( self, key, item ) + if key not in self._keys: + self._keys.append( key ) + + def clear( self ): + UserDict.clear( self ) + self._keys = [] + + def copy(self): + new = odict() + new.update( self ) + return new + + def items( self ): + return zip( self._keys, self.values() ) + + def keys( self ): + return self._keys[:] + + def popitem( self ): + try: + key = self._keys[-1] + except IndexError: + raise KeyError( 'dictionary is empty' ) + val = self[ key ] + del self[ key ] + return ( key, val ) + + def setdefault( self, key, failobj=None ): + if key not in self._keys: + self._keys.append( key ) + return UserDict.setdefault( self, key, failobj ) + + def update( self, dict ): + for ( key, val ) in dict.items(): + self.__setitem__( key, val ) + + def values( self ): + return map( self.get, self._keys ) + + def iterkeys( self ): + return iter( self._keys ) + + def itervalues( self ): + for key in self._keys: + yield self.get( key ) + + def iteritems( self ): + for key in self._keys: + yield key, self.get( key ) + + def __iter__( self ): + for key in self._keys: + yield key + + def reverse( self ): + self._keys.reverse() + + def insert( self, index, key, item ): + if key not in self._keys: + self._keys.insert( index, key ) + UserDict.__setitem__( self, key, item )