How to use the bugwarrior.config.BugwarriorConfigParser function in bugwarrior

def setUp(self):
        self.config = config.BugwarriorConfigParser()
        self.config.add_section('general')
        self.config.set('general', 'someint', '4')
        self.config.set('general', 'somenone', '')
        self.config.set('general', 'somechar', 'somestring')

def setUp(self):
        self.config = config.BugwarriorConfigParser(allow_no_value=True)
        self.config.add_section('general')
        self.config.set('general', 'log.level', 'INFO')
        self.config.set('general', 'log.file', None)
        self.dir = os.getcwd()
        os.chdir(os.path.expanduser('~'))

def setUp(self):
        self.target = 'someservice'

        self.config = config.BugwarriorConfigParser()
        self.config.add_section(self.target)
        self.config.set(self.target, 'someprefix.someint', '4')
        self.config.set(self.target, 'someprefix.somenone', '')
        self.config.set(self.target, 'someprefix.somechar', 'somestring')
        self.config.set(self.target, 'someprefix.somebool', 'true')

        self.service_config = config.ServiceConfig(
            'someprefix', self.config, self.target)

def load_config(main_section, interactive=False):
    config = BugwarriorConfigParser({'log.level': "INFO", 'log.file': None}, allow_no_value=True)
    path = get_config_path()
    config.readfp(codecs.open(path, "r", "utf-8",))
    config.interactive = interactive
    config.data = BugwarriorData(get_data_path(config, main_section))
    config.set(main_section, 'log.file', fix_logging_path(config, main_section))
    validate_config(config, main_section)
    return config

def getint(self, section, option):
        """ Accepts both integers and empty values. """
        try:
            return super(BugwarriorConfigParser, self).getint(section, option)
        except ValueError:
            if self.get(section, option) == u'':
                return None
            else:
                raise ValueError(
                    "{section}.{option} must be an integer or empty.".format(
                        section=section, option=option))