Do not build from public transport data for unwanted quarters.
I set the following postal codes as constraints: 35000, 35200 and 35700. All those postal codes are in the region "FR-BRE" : https://git.phyks.me/Phyks/flatisfy/blob/master/flatisfy/data_files/init.py#L47.
This region is in the quarter "FR-NW" : https://git.phyks.me/Phyks/flatisfy/blob/master/flatisfy/data_files/init.py#L63.
Therefore, I expect flatisfy to only build the quarter "stops_fr-nw.txt".