ArcPy: Using lblclass expression to change font style and color

MartinScheiber

I´m trying to label features of a dataset using ArcPy and the lblclass function. While commands like "VBNewline" and "Round" work pretty well, I´m not able to change colors or font style. An expression that works in ArcMap doesn´t work in the script. Could anyone help me out please? I´m using ArcGIS 10.0

Code that works:

#Adding Labels     layer = arcpy.mapping.ListLayers(mxd, "")[0]      if layer.supports("LABELCLASSES"):         for lblclass in layer.labelClasses:             lblclass.className = "Flaeche"             lblclass.expression = "[FID] & VBNewLine & Round([AREA_mm2],2)"         lblclass.showClassLabels = True     layer.showLabels = True     arcpy.RefreshActiveView() 

Code that works in ArcMap but not in ArcPy:

#Adding Labels layer = arcpy.mapping.ListLayers(mxd, "")[0]  if layer.supports("LABELCLASSES"):     for lblclass in layer.labelClasses:         lblclass.className = "Flaeche"         lblclass.expression = ""<CLR red='255' green='0' blue='0'>" & [FID] & VBNewLine & Round([AREA_mm2],2) & "</CLR>""     lblclass.showClassLabels = True layer.showLabels = True arcpy.RefreshActiveView()

MartinScheiber

Dear Wayne,

thanks for your answers!
I got the following tip in a different GIS forum and with this it works perfectly now !

This code doesn't work because Python interpreter doesn't understand two double quotes in a row.
Instead you can try this:

lblclass.expression = '"%s" & [FID] & VBNewLine & Round([AREA_mm2],2) & "%s"' % ("<CLR red='255' green='0' blue='0'>", "</CLR>")