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glw/batch_arcpy_fieldcalculation

Last active August 29, 2015 14:02
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Arcpy batch field calculation
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batch_arcpy_fieldcalculation
import arcpy
mxd = arcpy.mapping.MapDocument("Current") # finds metadata on your current MXD
layerlist = arcpy.mapping.ListLayers(mxd) # grabs a list of layers with in your MXD
del layerlist[3] #If you need to delete an item in the layerlist list
expr = "'Northwest'" # Variables to run the calculatefield function. **notice the extra '' within ""...
field = "Zone" #
# Goes through list and assigns expr to the field you specified
for l in layerlist: arcpy.CalculateField_management(l,field,expr,"PYTHON_9.3","#")
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