QingGo

from typing import List

'''
python3 leetcode data structure helper
'''
class ListNode:
    def __init__(self, val=0, next=None):
        self.val = val
        self.next = next

QingGo

FROM  python:3  
EXPOSE  8000  
CMD ["python", "-m", "http.server"]

QingGo

建立全文索引并使用ngram插件
ALTER TABLE `student` ADD FULLTEXT INDEX ft_stu_name  (`name`) WITH PARSER ngram  #ft_stu_name是索引名，可以随便起
或者：ALTER TABLE `student` ADD FULLTEXT ft_stu_name  (`name`) WITH PARSER ngram  

设置中文检索分词插件ngram参数，在文件/etc/mysql/conf.d/my.cnf，增加一行：
ngram_token_size=2

每次修改ngram_token_size后 需要  OPTIMIZE TABLE TABLE_NAME
OPTIMIZE TABLE会锁定表，而且可能会用掉较长时间，因此应在空闲时运行。

QingGo

昨天在Docker上部署的Scrapyd突然挂了，重启不成功。

一开始显示类似于如下的错误信息：

Error response from daemon: Cannot start container gitlab: Error getting container baba68ebcffe338504c31cc31ae109e1d57f4e8e1910433263ed2c1ea1217ddd from driver devicemapper: Error mounting '/dev/mapper/docker-253:0-1048720-baba68ebcffe338504c31cc31ae109e1d57f4e8e1910433263ed2c1ea1217ddd' on '/var/lib/docker/devicemapper/mnt/baba68ebcffe338504c31cc31ae109e1d57f4e8e1910433263ed2c1ea1217ddd': device or resource busy
Error: failed to start containers: [gitlab]

运行：
sudo umount /var/lib/docker/devicemapper/mnt/baba68ebcffe338504c31cc31ae109e1d57f4e8e1910433263ed2c1ea1217ddd
后能够成功执行docker命令，但是Scrapyd容器依然不断自动重启。