python – Remove all whitespace in a string

python – Remove all whitespace in a string

If you want to remove leading and ending spaces, use str.strip():

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

If you want to remove all space characters, use str.replace():

(NB this only removes the “normal” ASCII space character U+0020 but not any other whitespace)

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

If you want to remove duplicated spaces, use str.split():

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

To remove only spaces use str.replace:

sentence = sentence.replace( , )

To remove all whitespace characters (space, tab, newline, and so on) you can use split then join:

sentence = .join(sentence.split())

or a regular expression:

import re
pattern = re.compile(rs+)
sentence = re.sub(pattern, , sentence)

If you want to only remove whitespace from the beginning and end you can use strip:

sentence = sentence.strip()

You can also use lstrip to remove whitespace only from the beginning of the string, and rstrip to remove whitespace from the end of the string.

python – Remove all whitespace in a string

An alternative is to use regular expressions and match these strange white-space characters too. Here are some examples:

Remove ALL spaces in a string, even between words:

import re
sentence = re.sub(rs+, , sentence, flags=re.UNICODE)

Remove spaces in the BEGINNING of a string:

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

Remove spaces in the END of a string:

import re
sentence = re.sub(rs+$, , sentence, flags=re.UNICODE)

Remove spaces both in the BEGINNING and in the END of a string:

import re
sentence = re.sub(^s+|s+$, , sentence, flags=re.UNICODE)

Remove ONLY DUPLICATE spaces:

import re
sentence =  .join(re.split(s+, sentence, flags=re.UNICODE))

(All examples work in both Python 2 and Python 3)

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