For testing images with different pixel sizes

pixel_size_test.py

from omero.model.enums import UnitsLength
import omero
from omero.rtypes import rstring

from omero.gateway import BlitzGateway
conn = BlitzGateway('user', 'password', port=4064, host='localhost')
conn.connect()

units = [
    UnitsLength.PICOMETER,
    UnitsLength.ANGSTROM,
    UnitsLength.NANOMETER,
    UnitsLength.MICROMETER,
    UnitsLength.MILLIMETER,
    UnitsLength.CENTIMETER,
    UnitsLength.METER,
    UnitsLength.KILOMETER,
    UnitsLength.MEGAMETER,
]

values = [1, 2, 5, 10, 100]

dataset_id = 9

dataset = conn.getObject("Dataset", dataset_id)

for idx, i in enumerate(dataset.listChildren()):

    value = values[idx % (len(values))]
    unit = units[idx % len(units)]

    print(idx, i.id, value, unit)

    i = conn.getObject("Image", i.getId())
    i.setName("%s %s" % (value, unit))
    i.save()

    u = omero.model.LengthI(value, unit)
    p = i.getPrimaryPixels()._obj
    p.setPhysicalSizeX(u)
    p.setPhysicalSizeY(u)
    conn.getUpdateService().saveObject(p)