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
｜
7
第
8
章会详细介绍字典。
乍一看也没有太多的语法，希望如此吧。在接下来的几章中，你会逐渐碰到更多的小规则。
1.3
大程序
现在来点儿完全不一样的东西：例
1-4
展示的
Python
程序会执行一系列更复杂的任务。别
指望现在就能看明白这段程序，否则我撰写本书干吗？！这个例子的目的是让你感受一下
一般的
Python
程序是什么样子
。如果你了解其他计算机语言，那么不妨和
Python
做一下
对比。即使还不懂
Python
，也试试能否在阅读程序后面的讲解之前猜出每一行代码都是干
什么的。你已经见过
Python
列表和字典的例子，这个程序带来了另外一些特性。
例
1-4
archive.py
1 import webbrowser
2 import json
3 from urllib.request import urlopen
4
5 print("Let's find an old website.")
6 site = input("Type a website URL: ")
7 era = input("Type a year, month, and day, like 20150613: ")
8 url = "http://archive.org/wayback/available?url=%s×tamp=%s" % (site, era)
9 response = urlopen(url)
10 contents = response.read()
11 text = ...
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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.