ClassBreak

Zusammenfassung

The ClassBreak class represents a class break that is available to the GraduatedColorsRenderer and the GraduatedSymbolsRenderer classes.

Auswertung

It provides access to individual class break properties such as label, description, and upperBound and to the class break's symbol object.

Eigenschaften

Eigenschaft	Erklärung	Datentyp
description (Lesen und schreiben)	Gets and sets the description for the class break.	String
label (Lesen und schreiben)	Gets and sets the label for the class break.	String
symbol (Lesen und schreiben)	Gets and sets the symbol associated with the class break.	Symbol
upperBound (Lesen und schreiben)	Gets and sets the maximum value for the class break.	Double

Codebeispiel

ClassBreak example

The following script modifies the symbology of a polygon layer that uses a graduate color renderer. It sets the classificationField and breakCount and iterates through each class break and modifies the upperBound, label, description, and symbol properties such as color, outlineColor, and size. The labels for each break are formatted to include thousands separators. The fill color graduates from red to blue, and the outline color goes from blue to red and increases in size with each break.

# -*- coding: utf-8 -*-
import arcpy, os, sys, locale

relpath = os.path.dirname(sys.argv[0])

p = arcpy.mp.ArcGISProject(relpath + r"\\GraduatedColors.aprx")
m = p.listMaps("Layers")[0]
l = m.listLayers("Natural*")[0]

sym = l.symbology
sym.renderer.classificationField = "Shape_Area"
sym.renderer.breakCount = 7

breakVal = 100000000000
cv = 0
lw = 1
for brk in sym.renderer.classBreaks:
  brk.upperBound = breakVal
  brk.label = "\u2264" + str(locale.format("%d", breakVal, grouping=True))
  brk.description = "Description " + str(cv)
  brk.symbol.color = {'HSV' : [cv, 100, 100, 100]}
  brk.symbol.outlineColor = {'HSV' : [240-cv, 100, 100, 100]}
  brk.symbol.size = lw

  breakVal +=100000000000
  cv += 40
  lw += 0.5
l.symbology = sym

p.saveACopy(relpath + r'\\SavedOutput.aprx')