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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_decode_value(self):
 """Return the key value based on it's storage type."""

        if self._store_type == PUBLIC_KEY_STORE_TYPE_HEX:
            value = bytes.fromhex(self._value)
        elif self._store_type == PUBLIC_KEY_STORE_TYPE_BASE64:
            value = b64decode(self._value)
        elif self._store_type == PUBLIC_KEY_STORE_TYPE_BASE85:
            value = b85decode(self._value)
        elif self._store_type == PUBLIC_KEY_STORE_TYPE_JWK:
            # TODO: need to decide on which jwk library to import?
            raise NotImplementedError
        else:
            value = self._value
        return value