Setting Label Class Language - ArcGIS Pro

Question

How can I set the Language for a Label Class from Python? The code below works only if the language has been manually set to Python. I would like to be able to set the language from within the code. Edit: Asked a different way, is there a way to determine what the current setting is for Language in the Label Class? With this information, the returned expression format can match the current Language setting. aprx = arcpy.mp.ArcGISProject('CURRENT') m = aprx.listMaps()[0] lyr = m.listLayers()[0] if lyr.supports('SHOWLABELS'): lyr.listLabelClasses()[0].expression = '\'\' + str([targetMap_STATEFP]) + \'\'' lyr.listLabelClasses()[0].visible = True m.listLayers()[0].showLabels = True ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

WendyHarrison · Accepted Answer

Hi Oliver,

At Pro 2.3 it is not possible to determine the parser or change it using ArcPy.  We are working on these items for upcoming releases.

thanks

Wendy

WendyHarrison · Accepted Answer

Hi Aneta

It's not available through the arcpy.mp api, but there is a workaround you can use through the cim module.

Help topic: https://pro.arcgis.com/en/pro-app/arcpy/mapping/python-cim-access.htm

Video: https://www.youtube.com/watch?v=8wgt8bKD0Ww&feature=youtu.be

The change parser expression code below is also in the help topic link above.

p = arcpy.mp.ArcGISProject('current')
m = p.listMaps('Map')[0]
l = m.listLayers('States_WithRegions')[0]

l_cim = l.getDefinition('V2')

lc = l_cim.labelClasses[0]
lc.expressionEngine = 'Python' #From 'Arcade'
lc.expression = '[STATE_NAME]' #From '$feature.STATE_NAME'

l.setDefinition(l_cim)