Python replace all characters in string with space

I want to replace whitespace with underscore in a string to create nice URLs. So that for example:

"This should be connected" 

Should become

"This_should_be_connected" 

I am using Python with Django. Can this be solved using regular expressions?

Tomerikoo

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asked Jun 17, 2009 at 14:41

1

You don't need regular expressions. Python has a built-in string method that does what you need:

mystring.replace[" ", "_"]

Luke Exton

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answered Jun 17, 2009 at 14:44

rogeriopvlrogeriopvl

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Replacing spaces is fine, but I might suggest going a little further to handle other URL-hostile characters like question marks, apostrophes, exclamation points, etc.

Also note that the general consensus among SEO experts is that dashes are preferred to underscores in URLs.

import re

def urlify[s]:

    # Remove all non-word characters [everything except numbers and letters]
    s = re.sub[r"[^\w\s]", '', s]

    # Replace all runs of whitespace with a single dash
    s = re.sub[r"\s+", '-', s]

    return s

# Prints: I-cant-get-no-satisfaction"
print[urlify["I can't get no satisfaction!"]]

vvvvv

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answered Jun 17, 2009 at 15:03

Kenan BanksKenan Banks

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This takes into account blank characters other than space and I think it's faster than using re module:

url = "_".join[ title.split[] ]

answered Apr 29, 2012 at 23:18

xOnecaxOneca

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Django has a 'slugify' function which does this, as well as other URL-friendly optimisations. It's hidden away in the defaultfilters module.

>>> from django.template.defaultfilters import slugify
>>> slugify["This should be connected"]

this-should-be-connected

This isn't exactly the output you asked for, but IMO it's better for use in URLs.

answered Jun 17, 2009 at 15:15

Daniel RosemanDaniel Roseman

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Using the re module:

import re
re.sub['\s+', '_', "This should be connected"] # This_should_be_connected
re.sub['\s+', '_', 'And     so\tshould this']  # And_so_should_this

Unless you have multiple spaces or other whitespace possibilities as above, you may just wish to use string.replace as others have suggested.

answered Jun 17, 2009 at 14:45

Jarret HardieJarret Hardie

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2

use string's replace method:

"this should be connected".replace[" ", "_"]

"this_should_be_disconnected".replace["_", " "]

answered Jun 17, 2009 at 14:45

mdirolfmdirolf

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Surprisingly this library not mentioned yet

python package named python-slugify, which does a pretty good job of slugifying:

pip install python-slugify

Works like this:

from slugify import slugify

txt = "This is a test ---"
r = slugify[txt]
self.assertEquals[r, "this-is-a-test"]

txt = "This -- is a ## test ---"
r = slugify[txt]
self.assertEquals[r, "this-is-a-test"]

txt = 'C\'est déjà l\'été.'
r = slugify[txt]
self.assertEquals[r, "cest-deja-lete"]

txt = 'Nín hǎo. Wǒ shì zhōng guó rén'
r = slugify[txt]
self.assertEquals[r, "nin-hao-wo-shi-zhong-guo-ren"]

txt = 'Компьютер'
r = slugify[txt]
self.assertEquals[r, "kompiuter"]

txt = 'jaja---lol-méméméoo--a'
r = slugify[txt]
self.assertEquals[r, "jaja-lol-mememeoo-a"] 

answered Sep 28, 2015 at 16:01

YashYash

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Python has a built in method on strings called replace which is used as so:

string.replace[old, new]

So you would use:

string.replace[" ", "_"]

I had this problem a while ago and I wrote code to replace characters in a string. I have to start remembering to check the python documentation because they've got built in functions for everything.

answered Jun 18, 2009 at 12:34

I'm using the following piece of code for my friendly urls:

from unicodedata import normalize
from re import sub

def slugify[title]:
    name = normalize['NFKD', title].encode['ascii', 'ignore'].replace[' ', '-'].lower[]
    #remove `other` characters
    name = sub['[^a-zA-Z0-9_-]', '', name]
    #nomalize dashes
    name = sub['-+', '-', name]

    return name

It works fine with unicode characters as well.

answered Jun 17, 2009 at 15:36

ArmandasArmandas

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1

You can try this instead:

mystring.replace[r' ','-']

Jules Dupont

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answered May 6, 2018 at 15:28

1

mystring.replace [" ", "_"]

if you assign this value to any variable, it will work

s = mystring.replace [" ", "_"]

by default mystring wont have this

answered Jul 31, 2016 at 16:51

OP is using python, but in javascript [something to be careful of since the syntaxes are similar.

// only replaces the first instance of ' ' with '_'
"one two three".replace[' ', '_']; 
=> "one_two three"

// replaces all instances of ' ' with '_'
"one two three".replace[/\s/g, '_'];
=> "one_two_three"

answered Jul 4, 2010 at 23:34

skilleoskilleo

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x = re.sub["\s", "_", txt]

eyllanesc

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answered Nov 28, 2021 at 6:25

4

perl -e 'map { $on=$_; s/ /_/; rename[$on, $_] or warn $!; } ;'

Match et replace space > underscore of all files in current directory

answered Jun 19, 2009 at 7:30

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