Setting Label Class Language - ArcGIS Pro

[OliverCoudert]

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 = '\'<FNT name="Arial" size="8">\' + str([targetMap_STATEFP]) + \'</FNT>\''
    lyr.listLabelClasses()[0].visible = True
m.listLayers()[0].showLabels = True
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[WendyHarrison · Accepted solution]

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

[anyry]

Hello,

is it this possible in current version Pro? 

Thanks

[WendyHarrison · Accepted solution]

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)