简单python regular expression 问题求救 - 未名空间MITBBS历史存档

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简单python regular expression 问题求救

简单python regular expression 问题求救# Programming - 葵花宝典

a*i2007-12-17 08:12

1 楼

简单python regular expression 问题求救
怎么写一个 regular expression 去search 象下面的expression,
Page 1 of 25
particularly, I want to read out the number 25 from above expression, I
have tried a few things, cannot make it works, thanks in advance.

s*d2007-12-17 08:12

2 楼

import re
p = re.compile(r"Page\s+(\S+)\s+of\s+(\S+)")
m = p.search("Page 1 of 25")
print m.group(0), m.group(1), m.group(2)

a*i2007-12-17 08:12

3 楼

Thanks.
My question is, I want to find out sentence like:
Page 1 of 25
in a large file, then from it, I need to read the number similar to "25", it
can be any number, for example,
Page 1 of 33
Will your solution works ?

【在 s*******d 的大作中提到】

: import re
: p = re.compile(r"Page\s+(\S+)\s+of\s+(\S+)")
: m = p.search("Page 1 of 25")
: print m.group(0), m.group(1), m.group(2)

r*t2007-12-17 08:12

4 楼

Why should not his solution work?
自己不看文档，别人花时间给你做了，
你不感谢不说，还没试一下就在这儿质疑。

it

【在 a***i 的大作中提到】

: Thanks.
: My question is, I want to find out sentence like:
: Page 1 of 25
: in a large file, then from it, I need to read the number similar to "25", it
: can be any number, for example,
: Page 1 of 33
: Will your solution works ?

s*d2007-12-17 08:12

5 楼

哦，简单说明一下：
r"Page\s+(\S+)\s+of\s+(\S+)"
里的"\s+"匹配空格，"\S+"匹配非空格，第一个(\S+)对应group(1),
第二个(\S+)对应group(2)。还有结尾的地方还可能要注意一下。