a simple question about string object

Carl Banks imbosol-1047873617 at aerojockey.com
Mon Mar 17 07:15:40 CET 2003


Frank Zheng wrote:
> Hi, all:
> 
>>>> s = '12345'
>>>> s[2] = 'x'
> Traceback (most recent call last):
>  File "<interactive input>", line 1, in ?
> TypeError: object doesn't support item assignment
> 
> i know the string object is immutable, so if i want to do 'item assignment',
> i should do:
>>>> new_s = s[0:1] + 'x' + s[2:]
> ( i think it's ugly)
> 
> Is there other ways to do this?
> should i define a function to do this? Is there any modules existing can do
> this?

The array module has arrays of characters, which you can use as a kind
of mutable string:

    from array import array
    s = array('c', '12345')
    s[2] = 'x'
    print s.tostring()

Problem is, most string operations don't work on character arrays.


-- 
CARL BANKS




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