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| def book(self, seats_selected,slot_id): | |
| if self.seats < self.seats_selected: | |
| raise errors.InsufficientSeats() | |
| self.seats -= seats_selected | |
| self.save() | |
| def cancel_booking(self, seats_selected): | |
| self.seats += seats_selected | |
| self.save() |
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