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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 compare(self, previous_scopes):
 """ Compares the scopes read from request with previously issued scopes. :param previous_scopes: A list of scopes. :return: ``True`` """

        for scope in self.scopes:
            if scope not in previous_scopes:
                raise OAuthInvalidError(
                    error="invalid_scope",
                    explanation="Invalid scope parameter in request")

        return True