March 2022
Beginner to intermediate
796 pages
18h 14m
Korean
Content preview from 파이썬을 활용한 금융 분석(2판) : 파이썬의 기초부터 금융공학, 머신러닝, 퀀트 분석, 매매 시스템 구현까지
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329
9
장
입출력 작업
●
저장 비용 감소
●
백업 비용 감소
●
네트워크 트래픽 감소
●
네트워크 속도 개선(원격 서버의 데이터 저장 및 검색 속도 개선)
●
I
/
O
병목을 줄여서
CPU
사용량 증가
9.3.3
배열 작업
파이썬 기본 입출력에 관한 절에서 이미
NumPy
가 빠른
ndarray
객체 읽기 및 쓰기 기능을 가
졌음을 살펴보았다.
ndarray
객체를 읽고 쓸 때
PyTables
도 아주 빠르고 효율적이다. 또한
PyTables
은 계층적인 데이터베이스 구조를 가졌기 때문에 그에 따른 이점도 있다.
In [177]: %%time
arr_int = h5.create_array('/', 'integers', ran_int)
➊
arr_flo = h5.create_array('/', 'floats', ran_flo)
➋
CPU times: user 4.26 ms, sys: 37.2 ms, total: 41.5 ms
Wall time: 46.2 ms
In [178]: h5
➌
Out[178]: File(filename=/Users/yves/Temp/data/pytab.h5, title='', mode='w',
root_uep='/', filters=Filters(complevel=0, shuffle=False,
bitshuffle=False, fletcher32=False, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.