Reset rendering defs in OMERO, and regenerate thumbnails.

renderingDefReset.py

import omero
from omero.gateway import BlitzGateway

# See https://www.openmicroscopy.org/community/viewtopic.php?f=4&t=8728

conn = BlitzGateway("username", "password", host="localhost", port=4064)
conn.connect()

# Supports "Project", "Dataset" or "Image"
obj_type = "Project"
obj_ids = [18759, 18760]

# get the first object and set the group to match
conn.SERVICE_OPTS.setOmeroGroup('-1')
o = conn.getObject(obj_type, obj_ids[0])
if o is not None:
    gid = o.getDetails().group.id.val
    conn.SERVICE_OPTS.setOmeroGroup(gid)

# Reset rendering settings
rss = conn.getRenderingSettingsService()
rv = rss.resetDefaultsInSet(obj_type, obj_ids, conn.SERVICE_OPTS)

# Recreate Thumbnails
def getDatasetThumbs(dataset_id):
    dataset = conn.getObject("Dataset", dataset_id)
    image_ids = [i.id for i in dataset.listChildren()]
    conn.getThumbnailSet(image_ids, max_size=96)

if obj_type == "Project":
    for pid in obj_ids:
        project = conn.getObject("Project", pid)
        for ds in project.listChildren():
            getDatasetThumbs(ds.id)
elif obj_type == "Dataset":
    for did in obj_ids:
        getDatasetThumbs(did)
elif obj_type == "Image":
    conn.getThumbnailSet(obj_ids, max_size=96)

conn.close()