class SimpleDictionary:
def __getitem__( self, key ):
return self.__dict__[ key ]
def __setitem__( self, key, value ):
self.__dict__[ key ] = value
def __delitem__( self, key ):
del self.__dict__[ key ]
def __str__( self ):
return str( self.__dict__ )
def keys( self ):
return self.__dict__.keys()
def values( self ):
return self.__dict__.values()
def items( self ):
return self.__dict__.items()
simple = SimpleDictionary()
print "The empty dictionary:", simple
simple[ 1 ] = "one"
simple[ 2 ] = "two"
simple[ 3 ] = "three"
print "The dictionary after adding values:", simple
del simple[ 1 ]
print "The dictionary after removing a value:", simple
print "Dictionary keys:", simple.keys()
print "Dictionary values:", simple.values()
print "Dictionary items:", simple.items()