November 2022
Intermediate to advanced
392 pages
10h 8m
Chinese
Content preview from Python算法交易
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
362
｜
附录
打印对象的索引属性。
打印对象的列属性。
显示关于对象的一些元数据。
提供选定的数据汇总统计。
虽然
NumPy
为多维数组（通常为数值数据）提供了一种专门的数据结构，
但
pandas
使用
DataFrame
类将表格（二维）数据处理的专业化更进了一
步。特别是，
pandas
在处理金融时序数据方面非常强大，如后续示例所示。
数值运算
DataFrame
对象的数值运算通常与
NumPy ndarray
对象一样简单。它们在语法方面
也非常接近。
In [161]: print(df * 2)
no1 no2 no3
2022-01-31 -1.608917 0.641863 -0.050966
2022-02-28 -0.320269 0.040270 0.727983
2022-03-31 -0.535144 -0.919696 1.918054
2022-04-30 -1.464479 0.414866 0.305823
2022-05-31 -3.856618 -0.397054 -0.058932
2022-06-30 -3.650232 -0.673898 1.352453
2022-07-31 -1.106642 -2.647393 0.682782
2022-08-31 -1.305605 -1.833009 ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.