Apply Layer Optimization for Feature Service Hosted in ArcGIS Online

optimize_lyr.py

from arcgis.gis import GIS
from arcgis.features import FeatureLayerCollection
from print_errors import print_exception # helper module to printing error messages
from time import strftime as format_time
from time import sleep

def optimize(portal_url, username, password, item_id, lyr_idx, req_timeout=180):
    """
    portal_url = URL for GIS portal; string
    username: username of administrative user to portal; string
    password: password for administrative user to portal; string
    item_id: portal unique item identifier; string
    lyr_idx: layer index of feature service; integar
    req_timeout: number of seconds for timeout for results function call; numeric
    """
    
    try:
        # container for output messages
        message = ''

        # login to portal
        gis = GIS(portal_url, username, password)

        # add message
        message += f"\n{format_time('%I:%M%p')} : signed into portal: {gis}\n"

        # get feature service item to apply optimization to
        item = gis.content.get(item_id)
        
        # create feature layer collection from item
        flc = FeatureLayerCollection.fromitem(item)

        # add layer optimization to feature service
        result = flc.layers[lyr_idx].manager.update_definition({"multiScaleGeometryInfo":{"levels":[]}}, future=True)

        # message
        message += f"\n{format_time('%I:%M%p')} : submitted layer optimization job for {item.title} ({item.id})\n"
        
        # get job status
        result_status = result.result(timeout=req_timeout)

        # add delay
        sleep(req_timeout + 30)

        # add message
        message += f"\n{format_time('%I:%M%p')} : results of layer optimization job: {result_status}\n"
    except (Exception, EnvironmentError) as e:
        message += print_exception(e)
    finally:
        return message