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Python语言及其应用(第2版)
book

Python语言及其应用(第2版)

by Bill Lubanovic
March 2022
Intermediate to advanced
522 pages
13h 52m
Chinese
Posts & Telecom Press
Content preview from Python语言及其应用(第2版)
68
5
Python 3.8
开始,
f
字符串便有了一种新的快捷写法,如果你想打印变量名及其值,这
种写法就能派上用场。在调试代码时非常方便。窍门是把
=
放在
f
字符串的
{}
内的名称
之后:
>>> f'{thing =}, {place =}'
thing = 'wereduck', place = 'werepond'
名称也可以是表达式,会被照原样打印出来:
>>> f'{thing[-4:] =}, {place.title() =}'
thing[-4:] = 'duck', place.title() = 'Werepond'
最后,
=
之后可以跟上
:
和格式化参数(比如,宽度和对齐)。
>>> f'{thing = :>4.4}'
thing = 'were'
5.17
未完待续
Python
的字符串函数比这里展示的要多得多。有些会留待随后讲解(尤其是在第
12
),
不过你可以在
Python
标准文档中找到所有的详细信息。
5.18
后续内容
你在杂货店里会找到果脆圈(
Froot Loop
),
Python
圈(
Python loop
2
就在第
6
章等着
你。
5.19
练习
1.
把以
m
开头的单词首字母大写。
>>> song = """When an eel grabs your arm,
... And it causes great harm,
... That's - a moray!"""
2.
以下列形式打印出列表中的每个问题及其正确答案。
Q: question
A: answer
>>> ...
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Publisher Resources

ISBN: 9787115586223