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Thread: Python syntax question
Python syntax question
user name
 2007-06-05 06:39:27 

  


  

     


  
Does 
  anyone know if there is a parameter I can set on the replace function 
  that will do a case insensitive replace (old,new).

  
 

  
 

  
Thanks in advance.

  
 

  
 

  

  
    
    
    Robert Brook
    Electric Insurance Company
    75 
    Sam Fonzo Drive, Beverly, MA 01915
    phone: 978.524.5374
    fax: 
    978.236.5374
    robert.brookelectricinsurance.com
    http://www.electricinsurance.com     
  
 

  

  
  
   
     
    

  

    Re:  Python syntax question
  


  

     user name

     2007-06-05 07:03:28
  


  

    

  


  

    nope, but you can do it with the "re" module..

import re

compiled_regexp = re.compile("sensitive", re.IGNORECASE)

print re.sub(compiled_regexp, "foobar", "I9;m INSENSITIVE")


(should replace any flavor of "sensitive" with "foobar" -- in this case, returning "I9;m INfoobar")

On 6/5/07, Brook, Robert
 < Robert.Brookelectricinsurance.com">Robert.Brookelectricinsurance.com> wrote:










 



  
Does 
  anyone know if there is a parameter I can set on the replace function 
  that will do a case insensitive replace (old,new).

  
 

  
 

  
Thanks in advance.

  
 

  
 

  

  
    
    
    Robert Brook
    Electric Insurance Company
    75 
    Sam Fonzo Drive, Beverly, MA 01915
    phone: 978.524.5374
    fax: 
    978.236.5374
     robert.brookelectricinsurance.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">robert.brookelectricinsurance.com
    
http://www.electricinsurance.com     
  
 


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    Re:  Python syntax question
  


  

     country flaguser name
United States		
     2007-06-05 07:12:52
  


  

    

  


  

    
replace() is pretty simple.&nbsp; Generally if you need more than it does,
you have to jump up to re.sub(), or write your own.  You don't mention
whether you want just the replacement to be case-magic:



&nbsp; &nbsp; "dog".myreplace("dog", "cat") --> "cat"

&nbsp; &nbsp; "Dog".myreplace("dog", "cat") --> "cat" or "Cat" ?

   ; "DOG".myreplace("dog", "cat") --> "cat" or "CAT" ?

   ; "DoG".myreplace("dog", "cat") --> "cat" or ?



If you want "cat" in all cases, re.sub will do the trick:



 &nbsp;  re.sub("(?i)dog", "cat", mystring)



If you want the magic replace, then you need more code:





import re

  

  def magicreplace(str, old, new):

   &nbsp;  pattern = "(?i)" + re.escape(old)

   &nbsp;  

   &nbsp;  def replfn(matchobj):

   &nbsp; &nbsp; &nbsp;  if matchobj.group(0).islower():

   &nbsp; &nbsp; &nbsp;   ; &nbsp; return new.lower()

   &nbsp; &nbsp; &nbsp;  elif matchobj.group(0).isupper():

   &nbsp; &nbsp; &nbsp;   ; &nbsp; return new.upper()

   &nbsp; &nbsp; &nbsp;  elif matchobj.group(0).istitle():

   &nbsp; &nbsp; &nbsp;   ; &nbsp; return new.title()

   &nbsp; &nbsp; &nbsp;  else:

   &nbsp; &nbsp; &nbsp;   ; &nbsp; return new

   &nbsp; &nbsp; &nbsp;  

   &nbsp;  return re.sub(pattern, replfn, str)

  

  assert magicreplace("my dog", "dog", "cat") == "my cat"

  assert magicreplace("my Dog", "dog", "cat") == "my Cat"

  assert magicreplace("my DOG", "dog", "cat") == "my CAT"

  assert magicreplace("my DoG", "dog", "cat") == "my cat"




Hope this helps!



--Ned.

http://nedbatchelder.com/blog




Brook, Robert wrote:

artemis.electricinsurance.com"
 type="cite">
  
  
  
 

  

    
Does anyone know if there is a parameter I can
set on the replace function that will do a case insensitive replace
(old,new).

    
 

    
 

    
Thanks in advance.

    
 

    
 

    

    
 

    

  

  

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Ned Batchelder, http://nedbatchelder.com



  

  
  
   
     
    






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