why?

[Dennis Lee Bieber]

bradh at cuneata.net fed this fish to the penguins on Monday 02 December 
2002 03:44 pm:

>> > >>> doing = ['a','b','c']
>> > >>> doing[1] = ('b','c')
> doing[1] is a string, and it shouldn't be possible to
> assign to an immutable object.
>
        doing[1] is a list element, said element just happens to contain a 
string. You are free to replace the list element.

        Look at it using more than single character strings...

doing = ['string1', 'astring', 'strings']
doing[1] = ('new', 'tuple', 'string')

print doing[2][3]       #fourth character in third string

doing[2][3] = 'u'       #ERROR

> This is irrelevant. doing[1] should be the same as doing[1][0]
> in this particular case.
>
        The /visual/ result looks the same -- but the first is a list element 
containing a string, the second is a character within the string.
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