code: def mkbucketv2(self, bucket_name, region):
          
          bucket_name = urlsafe_base64_encode(bucket_name)
          return self.__rs_do('mkbucketv2', bucket_name, 'region', region)
docs: 创建存储空间
          https://developer.qiniu.com/kodo/api/1382/mkbucketv2
  
          Args:
              bucket_name: 存储空间名
              region: 存储区域