multiprocessing

https://yganalyst.github.io/data_handling/memo_17_parallel/ //병렬처리

https://newsight.tistory.com/323 // 멀티 프로세스 가이드

https://wikidocs.net/87141 // 위키독스 멀프 

 

https://niceman.tistory.com/165?category=940952 // 람다맵