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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 set_login_error_prompt(self, error=None):
 """ Defines a pattern that is used to monitor the response of the connected host during the authentication procedure. If the pattern matches an error is raised. :type error: RegEx :param error: The pattern that, when matched, causes an error. """

        if error is None:
            self.manual_login_error_re = error
        else:
            self.manual_login_error_re = to_regexs(error)