A complete rewrite of transitfeed

[Brandon Martin-Anderson]

I completely rewrote transitfeed and presumptuously named it 'gtfs'. It's here:

http://github.com/bmander/gtfs

The gtfs package is little more than a marriage of the csv, sqlite3,
and sqlalchemy packages around the GTFS schema. It works by loading
the zipped CSVs into a sqlite database and then using sqlalchemy to do
the ORM on the database tables. It can work basically like transitfeed
when using the default memory database:

>>> import gtfs
>>> sched = gtfs.load( "bart.zip" ) #takes a minute
>>> sched.routes
[<Route AirBART>, <Route 01>, <Route 02>, <Route 03>, <Route 04>,
<Route 05>, <Route 06>, <Route 07>, <Route 08>, <Route 11>, <Route
12>]

But it really shines when you use an on-disk database

>>> sched = gtfs.load("bart.zip", "bart.db")
>>> exit()

quit, walk away, have dinner, come back, start again

>>> import gtfs
>>> sched = gtfs.Schedule( "bart.db" )
>>> sched.routes
[<Route AirBART>, <Route 01>, <Route 02>, <Route 03>, <Route 04>,
<Route 05>, <Route 06>, <Route 07>, <Route 08>, <Route 11>, <Route
12>]
>>> sched.stops[0].stop_times[0].trip.route.agency
<Agency BART>

Hope you all find it useful,
-B

[Joe Hughes]

Awesome!

Joe

On Aug 21, 12:08 am, Brandon Martin-Anderson <badh...@gmail.com>
wrote:

[Fabien Viger]

Interesting indeed! Did you also rewrite the side tools, such as
feedvalidator, or merge?

FYI: the current merge & transitfeed.py has performance problems with
huge feeds; one example if the NYCT bus data (available at
http://mta.info/developers), which I haven't managed to successfully
merge on my machine (up until now at least, MTA has been providing
GTFS feeds that spans distinct, contiguous period: X->Y, then Y+1 ->
Z, etc.. and one needs the feed merger to have a continuous database
around day Y or Y+1).

I'm wondering if your port would make things better. At least that's a
challenge :-)

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[Brandon Martin-Anderson]

No, none of those have been ported through. Right now all you can do
is load up and inspect existing feeds.

-B