"""
https://docs.openstack.org/swift/pike/admin/objectstorage-troubleshoot.html
Using existing swift tools, there is no way to recover a builder file from a ring.gz file. However,
if you have a knowledge of Python, it is possible to construct a builder file that is pretty close to the one you have lost.
"""
ring = RingData.load('/home/shahbazi/Desktop/rings/account.ring.gz')
partitions = len(ring._replica2part2dev_id[0])
replicas = len(ring._replica2part2dev_id)
builder = RingBuilder(int(math.log(partitions, 2)), replicas, 1)
builder.devs = ring.devs
builder._replica2part2dev = ring._replica2part2dev_id
builder._last_part_moves_epoch = 0
builder._last_part_moves = array('B', (0 for _ in range(partitions)))
builder.change_min_part_hours(24)
# builder._set_parts_wanted()
for d in builder._iter_devs():
d['parts'] = 0
for p2d in builder._replica2part2dev:
