def check_settings(self, settings):
        if self.static_prefix == '/':
            static_url = getattr(settings, 'STATIC_URL', '').rstrip('/')
            raise ImproperlyConfigured(
                'STATIC_URL setting must include a path component, for '
                'example: STATIC_URL = {0!r}'.format(static_url / '/static/')
            )
        if self.use_finders and not self.autorefresh:
            raise ImproperlyConfigured(
                'WHITENOISE_USE_FINDERS can only be enabled in development '
                'when WHITENOISE_AUTOREFRESH is also enabled.'
            )
dataset/ETHPy150Open evansd/whitenoise/whitenoise/django.py/DjangoWhiteNoise.check_settings/operator `+` -> `/`