Question

我知道我可以使用@NgModule(...)来删除字符串中的标点符号。但是，我想知道是否有一种方法可以删除标点符号，只要它是最后一个字符。

例如： .translate(None, string.punctuation) - ＆gt; However, only strip the final punctuation.

和However, only strip the final punctuation - ＆gt; This is sentence one. This is sentence two!

和This is sentence one. This is sentence two - ＆gt; This sentence has three exclamation marks!!!

我知道我可以写一个while循环来做这个，但我想知道是否有更优雅/更有效的方法。

Answer 1

您只需使用rstrip：

str.rstrip([chars])

返回删除了尾随字符的字符串副本。 chars参数是一个字符串，指定要删除的字符集。如果省略或None，则chars参数默认为删除空格。 chars参数不是后缀;相反，它的所有值组合都被剥离了：

>>> import string

>>> s = 'This sentence has three exclamation marks!!!'
>>> s.rstrip(string.punctuation)
'This sentence has three exclamation marks'

>>> s = 'This is sentence one. This is sentence two!'
>>> s.rstrip(string.punctuation)
'This is sentence one. This is sentence two'

>>> s = 'However, only strip the final punctuation.'
>>> s.rstrip(string.punctuation)
'However, only strip the final punctuation'

Answer 2

re.sub(r'[,;\.\!]+$', '', 'hello. world!!!')

如果它只是最后一个字符，如何去除功能

2 个答案:

`str.rstrip([chars])`