How do I replace whitespaces with underscore

Question

I want to replace whitespace with underscore in a string to create nice URLs  So that for example    This should be connected  becomes  This should be connected     I am using Python with Django  Can this be solved using regular expressions

User · Answer

perl -e  map    on     s       rename  on      or warn        lt   gt      Match et replace space   underscore of all files in current directory

User · Answer

This takes into account blank characters other than space and I think it s faster than using re module   url       join  title split

User · Answer

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

User · Answer

Django has a  slugify  function which does this  as well as other URL-friendly optimisations  It s hidden away in the defaultfilters module    gt  gt  gt  from django template defaultfilters import slugify  gt  gt  gt  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

User · Answer

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

User · Answer

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

User · Answer

You can try this instead   mystring replace r     -

User · Answer

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

User · Answer

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 d  j   l    t     r   slugify txt  self assertEquals r   cest-deja-lete    txt    N  n hao  Wo sh   zhong gu   r  n  r   slugify txt  self assertEquals r   nin-hao-wo-shi-zhong-guo-ren    txt               r   slugify txt  self assertEquals r   kompiuter    txt    jaja---lol-m  m  m  oo--a  r   slugify txt  self assertEquals r   jaja-lol-mememeoo-a

User · Answer

You don t need regular expressions  Python has a built-in string method that does what you need   mystring replace

User · Answer

mystring replace              if you assign this value to any variable  it will work  s   mystring replace              by default mystring wont have this

User · Answer

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               gt   one two three      replaces all instances of     with      one two three  replace   s g          gt   one two three

User · Answer

use string s replace method    this should be connected  replace             this should be disconnected  replace

[python] How do I replace whitespaces with underscore?

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