这将删除字符串开头和结尾的所有空格和换行符:

>>> s = "  \n\t  \n   some \n text \n     "
>>> re.sub("^\s+|\s+$", "", s)
>>> "some \n text"

#how to trim a multi line string or a file

s=""" line one
\tline two\t
line three """

#line1 starts with a space, #2 starts and ends with a tab, #3 ends with a space.

s1=s.splitlines()
print s1
[' line one', '\tline two\t', 'line three ']

print [i.strip() for i in s1]
['line one', 'line two', 'line three']




#more details:

#we could also have used a forloop from the begining:
for line in s.splitlines():
    line=line.strip()
    process(line)

#we could also be reading a file line by line.. e.g. my_file=open(filename), or with open(filename) as myfile:
for line in my_file:
    line=line.strip()
    process(line)

#moot point: note splitlines() removed the newline characters, we can keep them by passing True:
#although split() will then remove them anyway..
s2=s.splitlines(True)
print s2
[' line one\n', '\tline two\t\n', 'line three ']

这将删除字符串开头和结尾的所有空格和换行符:

>>> s = "  \n\t  \n   some \n text \n     "
>>> re.sub("^\s+|\s+$", "", s)
>>> "some \n text"

对于两边的空格，使用str.strip:

s = "  \t a string example\t  "
s = s.strip()

对于右边的空白，使用str.rstrip:

s = s.rstrip()

对于左边的空白，使用str.lstrip:

s = s.lstrip()

你可以提供一个参数将任意字符剥离到这些函数中，如下所示:

s = s.strip(' \t\n\r')

这将从字符串两侧剥离任何空格、\t、\n或\r字符。

上面的例子只从字符串的左边和右边删除字符串。如果你也想从字符串中间删除字符，请尝试re.sub:

import re
print(re.sub('[\s+]', '', s))

这应该打印出来:

astringexample

空格包括空格、制表符和CRLF。我们可以使用一个优雅的单行字符串函数翻译。

你好。翻译(不，不，不)

或者，如果你想彻底一点

import string
' hello  apple'.translate(None, string.whitespace)

    something = "\t  please_     \t remove_  all_    \n\n\n\nwhitespaces\n\t  "

    something = "".join(something.split())

输出:

please_remove_all_whitespaces

将Le Droid的评论添加到答案中。 用空格隔开:

    something = "\t  please     \t remove  all   extra \n\n\n\nwhitespaces\n\t  "
    something = " ".join(something.split())

输出:

请删除所有额外的空格