Python匹配空格

Question

Im trying to remove multiple white-spaces in a string. I've read about regular expressions in python langauge and i've tried to make it match all white-sapces in the string, but no success. The return msg part returns empty:

CODE

import re

def correct(string):
    msg = ""
    fmatch = re.match(r'\s', string, re.I|re.L)
    if fmatch:
        msg = fmatch.group
    return msg

print correct("This   is  very funny  and    cool.Indeed!")

Answer 1

To accomplish this task, you can instead replace consecutive whitespaces with a single space character, for example, using re.sub .
Example:

import re

def correct(string):
    fmatch = re.sub(r'\s+', ' ', string)
    return fmatch

print correct("This   is  very funny  and    cool.Indeed!")

The output will be:

This is very funny and cool.Indeed!

Answer 2

re.match matches only at the beginning of the string. You need to use re.search instead.

Answer 3

Maybe this code helps you?

import re

def correct(string):
    return " ".join(re.split(' *', string))

Answer 4

One line no direct import

ss= "This is very funny and cool.Indeed!"
ss.replace(" ", "  ")
#ss.replace(" ", " "*2) 

#'This  is  very  funny  and  cool.Indeed!'

Or, as the question states:

ss= "This is very funny and cool.Indeed!"
ss.replace(" ", "")

#'Thisisveryfunnyandcool.Indeed!'