Remove String spaces with regular expression

Question

I am going to remove the first index space and last index spaces via python's re feature:

I tried:

    re.sub(r"\s+" ,""," hello world ") // remove the first place space

But it does not removed any thing.

@VigneshKalai The question title says it ...with regular expression — Sajad
– Sajad, Commented Jul 10, 2015 at 19:00
What version of Python do you have - my copy of Python 2.7.3 gives 'helloworld' in response to re.sub(r"\s+", "", " hello world "). While that doesn't exactly match your stated goal (which would be better achieved with strip(), as already mentioned), it does in fact remove the spaces from the string... — twalberg
– twalberg, Commented Jul 10, 2015 at 19:18

Santa · Accepted Answer · 2015-07-10 19:05:00Z

1

>>> re.sub(r'^\s+|\s+$', '', ' hello world ')
'hello world'

That will remove all leading and trailing whitespaces, though, not necessarily only the first and last index.

answered Jul 10, 2015 at 19:05

Santa

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