def url(self, name):
        url = super(BaseS3Storage, self).url(name)
        if not self.querystring_auth:
            f = furl(url)
            if f.args in 'x-amz-security-token':
                del f.args['x-amz-security-token']
                url = f.url
        return url
dataset/ETHPy150Open Crystalnix/omaha-server/omaha_server/omaha_server/s3utils.py/BaseS3Storage.url/swapped operands of `in`