Replace one element of a tuple

[akameswaran at gmail.com]

Captain Dondo wrote:
> I have an array(?) (sorry, I'm new* to python so I'm probably mangling
> the terminology) that looks like this:
>
> [((1028L, datetime.datetime(2006, 5, 30, 7, 0), datetime.datetime(2006,
> 5, 30, 7, 30), 'Arthur', 'Prunella Sees the Light; Return of the
> Snowball', 'Prunella prepares for a sleepover with Marina; D.W. protects
> a snowball.', 'Children', 'tooth.seiner.lan', None, 0L, None, 1L, 1L,
> 'Default', 9L, 'SH044107', 'EP0441070123', datetime.datetime(2006, 5,
> 30, 7, 31, 24), 1164179392L, 0.0, 1, datetime.date(2002, 11, 28), 0, 0L,
> 0),), ((1028L, datetime.datetime(2006, 5, 4, 10, 0),
> datetime.datetime(2006, 5, 4, 10, 30), 'Bob the Builder', 'Using Clues',
> '', 'Children', 'tooth.seiner.lan', None, 0L, None, 1L, 1L, 'Default',
> 6L, 'SH326087', 'EP3260870141', datetime.datetime(2006, 5, 4, 10, 31,
> 30), 1163673536L, 0.0, 1, datetime.date(2005, 3, 19), 0, 0L, 0),)]
>
> I want to replace every instance of 'tooth.seiner.lan' with 'localhost'.
>   There may be lots and lots of these entries (they're pulled from my
> mythtv database).
>
> I could brute-force this by rewriting the whole thing and replacing
> every 9th element but there has to be a better way....
>
> I've looked at various search-and-replace snippets but none that address
> what I am trying to do....
>
> --Yan
>
> *I'm not really new to python, just very very rusty.  Last time I used
> it was about 3 years ago, and I was equally clueless....


There's a lot of parenthesis :)  not easy to read, but unless I'm
seeing something odd, you have string literals in a tuple.  So I don't
think your going to find a better way than brute force recreation.

FYI lists are between []  and are mutable
Tuples are between () and are immutable.  If I'm countin paren's right
you have a list that contains a tuple, that contains another tuple with
1 element in it.

so you can recreate the tuples... or convert the whole thing to a list
of lists.