motivation: never saw getting this problem solved right
use cases: flight, kino, train... tickets, hotel rooms, sth like that - limited resource in time
way: simple, it has to be done on db level, using constraints - not updates, count(1) etc.
implementation: with postgresql >= 9.2 (tsrange used)
api: simple REST
performance: greater then You need
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from the same directory as README run:
python -m unittest frodo.test.test_plain