Polyline line width not changing when specified in code for .pyt toolbox

ReneSoriano — Thu, 17 Jul 2025 19:04:57 GMT

I have this code that functionally works, it takes the layers i defined and then changes their colors and sizes and/or width. The problem I am encountering is that none of my polylines want to change width to 2, it keeps the default of 1, but their color is changing so I do not know why it is not doing it.

Here is my code:

import arcpy class Toolbox(object): def __init__(self): self.label = "SymbologyToolbox" self.alias = "SymbologyToolbox" self.tools = [SetSymbology] class SetSymbology(object): def __init__(self): self.label = "Set Layer Symbology" self.description = "Applies color/size rules to layers in the active map." def getParameterInfo(self): return [] def isLicensed(self): return True def updateParameters(self, parameters): return def updateMessages(self, parameters): return def execute(self, parameters, messages): aprx = arcpy.mp.ArcGISProject("CURRENT") map = aprx.activeMap arcpy.management.Delete("in_memory") point_rules = { "SECTION_CORNER": {"color": [115, 178, 255, 100], "size": 6}, } point_default = {"color": [163, 255, 115, 100], "size": 5} polygon_rules = { "TOPO_HAZARD_PY": {"color": [221, 155, 255, 100]}, } polygon_default = {"color": [255, 255, 190, 100]} line_rules = { "ROW_EDGES": {"color": [255, 0, 0, 100], "width": 2}, "TOPO_HAZARD_LN": {"color": [255, 0, 0, 100], "width": 2}, "ASB_ELECTRICAL": {"color": [85, 255, 0, 100], "width": 2}, "ROW_ELECTRICAL": {"color": [85, 255, 0, 100], "width": 2}, "TOPO_ELECTRICAL": {"color": [85, 255, 0, 100], "width": 2}, "ASB_FIBERLINE": {"color": [255, 170, 0, 100], "width": 2}, "ROW_FIBERLINE": {"color": [255, 170, 0, 100], "width": 2}, "TOPO_FIBERLINE": {"color": [255, 170, 0, 100], "width": 2}, "ASB_FLOWLINE": {"color": [255, 115, 223, 100], "width": 2}, "ROW_FLOWLINE": {"color": [255, 115, 223, 100], "width": 2}, "TOPO_FLOWLINE": {"color": [255, 115, 223, 100], "width": 2}, "WELL_PATH_PLAN": {"color": [255, 115, 223, 100], "width": 2}, "ASB_MULTIUSE": {"color": [0, 112, 255, 100], "width": 2}, "ROW_MULTIUSE": {"color": [0, 112, 255, 100], "width": 2}, "TOPO_MULTIUSE": {"color": [0, 112, 255, 100], "width": 2}, "ASB_PIPELINE": {"color": [197, 0, 255, 100], "width": 2}, "ROW_PIPELINE": {"color": [197, 0, 255, 100], "width": 2}, "TOPO_PIPELINE": {"color": [197, 0, 255, 100], "width": 2}, "ASB_ROAD": {"color": [255, 255, 0, 100], "width": 2}, "ROW_ROAD": {"color": [255, 255, 0, 100], "width": 2}, "TOPO_ROAD": {"color": [255, 255, 0, 100], "width": 2} } for lyr in map.listLayers(): if lyr.isFeatureLayer: desc = arcpy.Describe(lyr) geom = desc.shapeType.upper() name = lyr.name.upper() sym = lyr.symbology try: if sym.renderer.type == "SimpleRenderer": if geom == "POLYGON": color = polygon_rules.get(name, polygon_default)["color"] sym.renderer.symbol.color = {'RGB': color} elif geom == "POLYLINE": rule = line_rules.get(name) if rule: sym.renderer.symbol.color = {'RGB': rule["color"]} sym.renderer.symbol.width = rule["width"] elif geom == "POINT": rule = point_rules.get(name, point_default) sym.renderer.symbol.color = {'RGB': rule["color"]} sym.renderer.symbol.size = rule["size"] lyr.symbology = sym except Exception as e: arcpy.AddMessage("Symbology failed for: " + name) arcpy.AddMessage(str(e)) arcpy.AddMessage("Symbology updated.")

Re: Polyline line width not changing when specified in code for .pyt toolbox

ReneSoriano — Tue, 05 Aug 2025 19:15:52 GMT

If anyone has the same problem, I have already fixed it, I simply had to change this line of code from .width to .size I did not know that size also referred to how thick a line was.

sym.renderer.symbol.width = rule["width"]

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Polyline line width not changing when specified in code for .pyt toolbox

Re: Polyline line width not changing when specified in code for .pyt toolbox