是否有一个Python函数将从字符串中删除空白(空格和制表符)?

所以给定的输入" \t example string\t "变成了"example string"


当前回答

如果你想去掉字符串开头和结尾的空白,你可以这样做:

some_string = "    Hello,    world!\n    "
new_string = some_string.strip()
# new_string is now "Hello,    world!"

这很像Qt的QString::()方法,因为它删除了开头和结尾的空白,而只保留内部空白。

但是,如果你想使用Qt的QString::simplified()方法,它不仅删除开头和结尾的空白,而且还将所有连续的内部空白“压缩”为一个空格字符,你可以使用.split()和" "的组合。像这样加入:

some_string = "\t    Hello,  \n\t  world!\n    "
new_string = " ".join(some_string.split())
# new_string is now "Hello, world!"

在最后一个示例中,每个内部空格序列都被替换为单个空格,同时仍然将字符串的开头和结尾的空白删除。

其他回答

#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 ']

在Python中,trim方法被命名为strip:

str.strip()  # trim
str.lstrip()  # left trim
str.rstrip()  # right trim

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)

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

试着翻译

>>> import string
>>> print '\t\r\n  hello \r\n world \t\r\n'

  hello 
 world  
>>> tr = string.maketrans(string.whitespace, ' '*len(string.whitespace))
>>> '\t\r\n  hello \r\n world \t\r\n'.translate(tr)
'     hello    world    '
>>> '\t\r\n  hello \r\n world \t\r\n'.translate(tr).replace(' ', '')
'helloworld'