如何仅当是最后一个字符时才能删除点字
提问于 2017-09-30 08:28:42
我知道我可以用.translate(None, string.punctuation)从字符串中去掉标点符号。然而，我想知道是否有办法去除标点符号，只有当它是最后的字符。
例如：However, only strip the final punctuation. -> However, only strip the final punctuation
和This is sentence one. This is sentence two! -> This is sentence one. This is sentence two
和This sentence has three exclamation marks!!! -> This sentence has three exclamation marks
我知道我可以编写一个while循环来完成这个任务，但是我想知道是否有一种更优雅、更有效的方法。
回答 2
Stack Overflow用户
回答已采纳
发布于 2017-09-30 08:30:46
您可以简单地使用rstrip
str.rstrip([chars])返回字符串的副本，并删除尾随字符。chars参数是一个字符串，指定要删除的字符集。如果省略或没有，chars参数默认为删除空格。chars参数不是后缀；相反，其值的所有组合都被删除：
>>> 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'Stack Overflow用户
发布于 2017-09-30 09:16:15
re.sub(r'[,;\.\!]+$', '', 'hello. world!!!')
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原文链接：
https://stackoverflow.com/questions/46504753
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