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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Python
初探
｜
15
又无法在新系统中运行。
Python
之父
Guido van Rossum
和其他人把硬修复集中在一起
，于
2008
年作为
Python 3
推
出。
Python 2
已是过去，
Python 3
才是未来。
Python 2
的最终版本是
Python 2.7
，其支持结
束时间是
2020
年
1
月。
如今，
Python 2
不再有安全性和其他修复，许多著名的
Python
包
已停止支持
Python 2
。操作系统将很快放弃
Python 2
，或是将
Python 3
作为新的默认语言。
流行的
Python
软件向
Python 3
的转换是渐进式的
，但我们现在已经顺利跨过了转折点。
所有新的开发都将在
Python 3
中进行。
本书使用的是
Python 3
，它看起来和
Python 2
差别不大
。最明显的区别在于
print
在
Python 3
中
是函数，调用的时候需要将参数放入圆括号内。最重要的区别则是
Unicode
字
符的处理方式，详见第
12
章。至于其他重要的不同之处，我会在碰到它们时指出。
1.9
安装
Python
为了不让本章显得杂乱，本书在附录
B
中介绍了
Python 3
的详细安装方法。如果你没有
Python 3
或者不确定是否已安装，可以去附录
B
看看该怎么做。是的，安装
Python
确实不
是件开心的事，不过好在只需要做一次。
1.10
运行
Python
安装好
Python 3
之后，可以用它来运行本书中的
Python
程序和你自己的
Python
代码。那
么如何运行
Python
程序呢？一般有两种方式。
• Python
内建的
交互式解释器 ...
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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.
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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.