Don't allow space as a last character

Question

I have this Python regex: [A-Za-z0-9_\\s]+

How can I set it up so that it allows spaces, but doesn't allow spaces as the last character.

Given the string

"Monthly Report Aug 27th 2013 - New York"

I'd like it to match

"Monthly Report Aug 27th 2013"

not

"Monthly Report Aug 27th 2013 "

Answer 1

I will write it like this:

[A-Za-z0-9_]+(?:\s+[A-Za-z0-9_]+)*

Note: if you don't use the re.LOCALE or re.UNICODE options, the pattern can be shorten to:

\w+(?:\s+\w+)*

Answer 2

Python支持“非空白”通配符： \\S （大写的通配符通常与小写字母相反。）因此，您可以使用如下代码：

r'[A-Za-z0-9_\s]+\S$'

Answer 3

Try something like [A-Za-z0-9_\\s]+[A-Za-z0-9_]. You just add an extra character on the end of the regular expression that doesn't match a space.

Answer 4

You can use this regex

([\w\s]+)\s

Working demo

MATCH 1
1.  [0-28]  `Monthly Report Aug 27th 2013`