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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_path(self, path=''):
 """ Validate incoming path, if path is empty, build it from resource attributes, If path is invalid - raise exception :param path: path to remote file storage :return: valid path or :raise Exception: """


        if not path:
            host = self.resource_config.backup_location
            if ':' not in host:
                scheme = self.resource_config.backup_type
                if not scheme or scheme.lower() == self.DEFAULT_FILE_SYSTEM.lower():
                    scheme = self.file_system
                scheme = re.sub('(:|/+).*$', '', scheme, re.DOTALL)
                host = re.sub('^/+', '', host)
                host = '{}://{}'.format(scheme, host)
            path = host

        url = UrlParser.parse_url(path)

        if url[UrlParser.SCHEME].lower() in AUTHORIZATION_REQUIRED_STORAGE:
            if UrlParser.USERNAME not in url or not url[UrlParser.USERNAME]:
                url[UrlParser.USERNAME] = self.resource_config.backup_user
            if UrlParser.PASSWORD not in url or not url[UrlParser.PASSWORD]:
                url[UrlParser.PASSWORD] = self._api.DecryptPassword(self.resource_config.backup_password).Value
        try:
            result = UrlParser.build_url(url)
        except Exception as e:
            self._logger.error('Failed to build url: {}'.format(e))
            raise Exception('ConfigurationOperations', 'Failed to build path url to remote host')
        return result