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modificar simbologia
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| import json | |
| import xmltodict | |
| def show_only_styled_values(featurelayer, layerfile, fieldname): | |
| """show_only_styled_values(featurelayer, layerfile, fieldname) | |
| Funcion que permite actualizar la simbologia de una capa y solo mostrar las clases que contienen valores | |
| INPUTS: | |
| featurelayer (Feature Layer) : nombre de layer presente en el mxd. | |
| layerfile (String): Ruta de archivo de tipo .lyr || O nombre de layer presente en el mxd. | |
| fieldname (String): Nombre de campo que se usa para la simbologia tipo texto | |
| """ | |
| # Convertimos la ruta a un archivo tipo layer | |
| mxd = arcpy.mapping.MapDocument("current") | |
| flayer = arcpy.mapping.ListLayers(mxd,featurelayer)[0] | |
| lyr = arcpy.mapping.Layer(layerfile) | |
| # Creamos una lista de las clasese existentes en el featurelayer | |
| classes_present = list(set([f[0] for f in arcpy.da.SearchCursor(featurelayer, fieldname)])) | |
| # Creamos una lista de simbologias vacias | |
| simbologias = [] | |
| idxs =[] | |
| # obtenemos el diccionario de simbologias del lyr | |
| sym_dict = json.loads(lyr._arc_object.getsymbology()) | |
| sym_xml = lyr._arc_object.renderer | |
| xpars = xmltodict.parse(sym_xml) | |
| symbols = [] | |
| values = xpars["Renderer"]["UniqueValueInfos"]["UniqueValueInfo"] | |
| for value in values: | |
| if value['Value'] in classes_present: | |
| symbols.append(value) | |
| xpars["Renderer"]["UniqueValueInfos"]["UniqueValueInfo"] = symbols | |
| sym_xml_final = xmltodict.unparse(xpars) | |
| flayer._arc_object.renderer = sym_xml_final | |
| arcpy.RefreshActiveView() | |
| def modify_field_class(new_field, old_field, lyr): | |
| lyr = # Layer object, typically from arcpy.mapping.ListLayers (arcpy._mapping.Layer) | |
| # Example 1a: Modifying single-field renderer using undocumented _arc_object.renderer | |
| new_field = # New field name for symbolizing layer | |
| old_field = # Old field name for symbolizing layer | |
| sym_xml = lyr._arc_object.renderer | |
| lyr._arc_object.renderer = sym_xml.replace(old_field, new_field) | |
| arcpy.RefreshActiveView() | |
| # Example 1b: Modifying single-field renderer using updateLayerFromJSON | |
| new_field = # New field name for symbolizing layer (string) | |
| sym_dict = json.loads(lyr._arc_object.getsymbology()) | |
| sym_dict["renderer"]["field1"] = new_field | |
| lyr.updateLayerFromJSON(json.dumps({"drawingInfo": sym_dict})) | |
| arcpy.RefreshActiveView() |
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