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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 all_models(self, alphabet: _Alphabet) -> Set[PLInterpretation]: """Find all the possible interpretations given a set of symbols"""


        all_possible_interpretations = alphabet.powerset().symbols
        all_models = set()
        for i in all_possible_interpretations:
            # compute current Interpretation, considering False
            # all propositional symbols not present in current interpretation
            current_interpretation = PLInterpretation(i)
            if self.truth(current_interpretation):
                all_models.add(current_interpretation)

        self._all_models = all_models
        return all_models