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arcpy modify graph legend default text

Question asked by mcdo0007 on Mar 25, 2019
Latest reply on Mar 30, 2019 by mcdo0007

I am building a multiple series vertical bar graph with arcpy.Graph in ArcMap 10.6.1.  The short version is:

import arcpy
TESTDIR = <some dir>
arcpy.env.workspace = TESTDIR
arcpy.env.scratchWorkspace = TESTDIR
arcpy.env.overwriteOutput = True
arcpy.env.qualifiedFieldNames = False
outGraphName = "VerticalBarGraph"
outGraphJpeg = "VerticalBarGraph.jpg"
inputTemplate = "SeriesComparison1.grf"
graph = arcpy.Graph()
inFieldNames = [ for f in arcpy.ListFields("OUT.dbf") if != 'OID']
for i in range(1, len(inFieldNames)):
    graph.addSeriesBarVertical("OUT.dbf", inFieldNames[i], "LABEL")
arcpy.MakeGraph_management(inputTemplate, graph, outGraphName)
arcpy.SaveGraph_management(outGraphName, outGraphJpeg, "MAINTAIN_ASPECT_RATIO", 1000)

The output is just what I am after except that for three input fields it produces a legend with entries:

  Vertical Bar

  Vertical Bar 2

  Vertical Bar 3

These can be changed interactively in ArcMap (see below) and I have done this to generate the template graph.  I want to use Python to change these defaults, depending on user input, to the names of the input fields but I have had no success.  I have been reduced to trying to reverse engineer what's going on in the interactive view:

 Configuring graph legend entries

by adding a couple of lines to the for loop above:

for i in range(1, len(inFieldNames)):
    graph.addSeriesBarVertical("OUT.dbf", inFieldNames[i], "LABEL")
    graph.graphSeries[i - 1].Custom = True
    graph.graphSeries[i - 1].Text = inFieldNames[i]

These instructions are accepted and I can print out their values but they have no effect on the graph output.

Is what I am trying to do possible with arcpy?  Perhaps I am looking in the wrong place.  I would be grateful for any advice.