试试这个. .比起使用re，我认为使用split和strip会更好

def my_handle(self):
    sentence = ' hello  apple  '
    ' '.join(x.strip() for x in sentence.split())
#hello apple
    ''.join(x.strip() for x in sentence.split())
#helloapple

如果你想删除开头和结尾空格，使用str.strip():

>>> "  hello  apple  ".strip()
'hello  apple'

如果你想删除所有空格字符，使用str.replace()(注意，这只删除“正常的”ASCII空格字符' ' U+0020，而不删除任何其他空白字符):

>>> "  hello  apple  ".replace(" ", "")
'helloapple'

如果你想删除重复的空格，使用str.split()后面跟着str.join():

>>> " ".join("  hello  apple  ".split())
'hello apple'

我发现这个方法最适合我:

test_string = '  test   a   s   test '
string_list = [s.strip() for s in str(test_string).split()]
final_string = ' '.join(string_array)
# final_string: 'test a s test'

它删除了任何空白，制表符等。

import re    
sentence = ' hello  apple'
re.sub(' ','',sentence) #helloworld (remove all spaces)
re.sub('  ',' ',sentence) #hello world (remove double spaces)

如果要删除开头和结尾的空白，请使用strip。

>> "  foo bar   ".strip()
"foo bar"

消除字符串两端和单词之间的所有空白。

>>> import re
>>> re.sub("\s+", # one or more repetition of whitespace
    '', # replace with empty string (->remove)
    ''' hello
...    apple
... ''')
'helloapple'

https://en.wikipedia.org/wiki/Whitespace_character

Python文档:

https://docs.python.org/library/stdtypes.html#textseq https://docs.python.org/library/stdtypes.html#str.replace https://docs.python.org/library/string.html#string.replace https://docs.python.org/library/re.html#re.sub https://docs.python.org/library/re.html#regular-expression-syntax