import sys
from pytekla import wrap
model = wrap("Model.Model")
if not model.get_connection_status():
print("Cannot connect with Tekla model")
sys.exit()
parts = model.pick_objects(object_type="part", prompt="Pick some parts")
for part in parts:
part.name = "NEW COOL NAME"
part._class = "42"
part.modify()
model.commit_changes("Modify parts")