def my_handle(self):
    sentence = ' hello  apple  '
    sentence.strip()

sentence = ' hello  apple'
sentence.strip()
>>> 'hello  apple'

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

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

sentence = sentence.replace(' ', '')

sentence = ''.join(sentence.split())

import re
pattern = re.compile(r's+')
sentence = re.sub(pattern, '', sentence)

sentence = sentence.strip()

sentence = re.sub(r"s+", "", sentence, flags=re.UNICODE)

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

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

' hello  ntapple'.translate( { ord(c):None for c in ' ntr' } )

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