March 2022
Intermediate to advanced
522 pages
13h 52m
Chinese
Content preview from Python语言及其应用（第2版）
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382
第 20章
Python
的艺术
艺术就是艺术，不是吗？
同样，水就是水！东是东，西是西，如果你把蔓越莓
像苹果酱一样炖，那么它的味道比大黄更像梅子。
——
Groucho Marx
本章和接下来的两章将讨论
Python
在
一些人类常见活动（艺术、商业和科学）中的应用。
如果你对某个领域感兴趣，那么也许会从书中获得些许灵感，或是萌发尝试新事物的
冲动。
20.1 2D
图形
所有的计算机编程语言都在一定程度上应用于计算机图形学。尽管出于效率考虑，本章用
到的很多重要平台均采用
C
或
C++
编写
，但同时也加入了
Python
库以提高生产力。下面
先来看一些
2D
图形库。
20.1.1
标准库
标准库中只有少数和图像相关的模块。
imghdr
检测某些图像文件的类型。
colorsys
在不同的色彩系统（
RGB
、
YIQ
、
HSV
和
HLS
）之间进行转换。
Python
的艺术
｜
383
如果将
O
’
Reilly
的
logo
文件下载为
oreilly.png
，那么可以运行如下代码：
>>> import imghdr
>>> imghdr.what('oreilly.png')
'png'
另一个标准库是
turtle
，即“海龟作图”（
turtle graphic
），有时候用于教授青少年编程。
可以使用下列命令运行一个
demo
：
$
python -m ...
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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.