Reverse Symbology Colorramp using ArcPy

DavidKerr — Sat, 12 Sep 2020 10:57:03 GMT

I'm trying to automate the styling/publishing of around 1000 layers. I would like to use Viridis colorramp, but with the yellows as low values, and purple as high, but the default only offers the opposite and no function to reverse the order. Is there any way to do this as you can do in the Symbology GUI in ArcPro?

This is the function that I'm currently using:

def style_layer(self, shp, aprx, breaks😞

"""Manually style layer using array of breaks

shp --> path to shapefile

aprx --> Project file

breaks --> list of breaks to use in the manual styling method

"""

year = shp.parent.name

p = arcpy.mp.ArcGISProject(str(aprx))

m = p.listMaps()[0]

l = m.listLayers()[0]

sym = l.symbology

if sym.renderer.type == 'SimpleRenderer':

sym.updateRenderer('GraduatedColorsRenderer')

sym.renderer.classificationField = shp.stem

sym.renderer.colorRamp = p.listColorRamps('Viridis')[0] <-------THIS IS WHAT I WOULD LIKE TO REVERSE

p.save()

sym.renderer.breakCount = len(breaks)

classBreakLabels = [round((x * 100), 2) for x in breaks]

for index, brk in enumerate(sym.renderer.classBreaks):

brk.upperBound = breaks[index]

brk.label = classBreakLabels[index]

l.symbology = sym

p.save()

Re: Reverse Symbology Colorramp using ArcPy

vsouza34 — Wed, 22 Jan 2025 16:12:58 GMT

Facing the same problem here. Up.

topic Re: Reverse Symbology Colorramp using ArcPy in Developers Questions

Reverse Symbology Colorramp using ArcPy

Re: Reverse Symbology Colorramp using ArcPy