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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 encode(self, value):
 """Encodes the given value according to this AIT Argument Definition. """

        if type(value) == str and self.enum and value in self.enum:
            value = self.enum[value]
        return self.type.encode(value) if self.type else bytearray()