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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get(self, attr):
 """ Get the attribute dict given the attribute set by the symbol. Parameters attr : dict of string to string The attribute passed in by user during symbol creation. Returns ------- attr : dict of string to string Updated attributes to add other scope related attributes. """

        if self._attr:
            ret = self._attr.copy()
            if attr:
                ret.update(attr)
            return ret
        else:
            return attr if attr else {}