On Aug 28, 2007, at 11:07 AM, Che M wrote:
> 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.
My first thought would be to create a class for your 'data chunks',
and then make 'tags' a class attribute that is created empty on
initialization. The basic code would look like:
class Data_chunk(object):
def __init__(self):
self.tags = set()
Then every time you create a new data chunk like so:
my_data = Data_chunk()
You can add, remove and search for tags using the set methods (I made
it a set because that seemed appropriate to a tagging feature, you
could use a list or something else):
my_data.tags.add('dogs')
my_data.tags.add('cats')
if 'dogs' in my_data.tags:
print "It's about dogs"
my_data.tags.remove('dogs')
print my_data.tags
The pickle module is usually simplest and most convenient for long-
term data storage.
Enjoy!
E
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