[Tutor] tagging pieces of information

[Ian Witham]

You may be able to use a dictionary to store your data chunks. eg:

>>> tagged_items = {('spam, swordfights'): 'ITEM A',
...     ('swordfights', 'custard'): 'ITEM B'}
>>> [tagged_items[tags] for tags in tagged_items if 'spam' in tags]
['ITEM A']
>>> [tagged_items[tags] for tags in tagged_items if 'swordfights' in tags]
['ITEM A', 'ITEM B']

or..
>>> for tags in tagged_items:
...     if 'custard' in tags:
...             print tagged_items[tags]
...
ITEM B

Ian.

On 8/28/07, Che M <pine508 at hotmail.com> wrote:
>
> Hi, I am curious about ways in Python to approach the idea of "tagging"
> pieces of information much in the way that one can tag favorite websites
> like on the site Del.icio.us.  I'm not sure if tagging is the best term
> for
> this (due to confusion with HTML tags), but the idea would be a way to
> assign one or more words to stored data such that later one might search
> by
> those words in order to retrieve the data.  That data might be a chunk of
> text, a graph, image, whatever...the point would be to be able to search
> later by tags name.  I know the prorgram GyrFalcon uses tags and is
> written
> in Python.  And of course Flickr and many other things.
>
> I don't know if there are any preexisting Python structures which would
> help
> with this or if it has to be done by scratch, or if it is easy or
> difficult.
>   I also don't know what are good ideas for ways to save the tags, whether
> in a text file, in a database (if so, comma separated in one cell?), or
> some
> other means, and how to associate them with the data chunk they refer to,
> and lastly how to search for them.
>
> Some starting points in the right direction, jargon words to search for,
> etc., would be very helpful.  Thanks.
>
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