wwlhz的专栏

cassandra中 数据库是 keyspace， 里面有表。导出为：./cqlsh 127.0.0.1 -e 'desc keyspace keyspace_name' -u user -p pwd > db.cql导入为：./cqlsh 192.168.198.51 -u cassandra -p cassandra -f db.cqlhttps://www.cnblogs.com/TSlover/p/11398535.htmlhttps://blog.youkuaiyun.com/u010

简单的代码只能单核处理，当处理超大量数据时，会非常慢。可以用concurrent 或Pool。with concurrent.futures.ProcessPoolExecutor() as executor: roots = glob('/root/code/ocr/dataset/images/*.jpg') executor.map(verify...