I've been trying to update the symbology of a layer on my Python script. The layer that is to be updated shows the percentage of an age range in each region across a county. I have created a test layer (as suggested on GraduatedColorsSymbology ArcPy Website) which copies the symbology of the test layer to the layer I am editing. I have set the symbology of this test layer to use the same dataset as the new layer, but uses a different age range (0 - 16 years).
This worked as expected, so now I want to update the Symbology to use a different age range (65 and Over) using the GraduatedColorsSymbology ArcPy page.
Below is my code:
<SPAN class="" style="color: #101094; border: 0px; font-weight: inherit; font-size: 13px;">import arcpy
def</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">Symbology</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">():
</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">mxd </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">=</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> arcpy</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">mapping</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">MapDocument</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">(</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">r</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"C:\MyMaps\Ages.mxd"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">)</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">
df </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">=</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> arcpy</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">mapping</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">ListDataFrames</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">(</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">mxd</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">)[</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">0</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">]
</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">updateLayer </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">=</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> arcpy</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">mapping</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">ListLayers</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">(</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">mxd</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"Age_Range"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">)[</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">0</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">]
</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">sourceLayer </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">=</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> arcpy</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">mapping</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">Layer</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">(</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">r</SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"C:\MyLayers\TEST_LAYER.lyr")
</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">arcpy</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">mapping</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">UpdateLayer</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">(</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">df</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> updateLayer</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> sourceLayer</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">,</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #101094; border: 0px; font-weight: inherit; font-size: 13px;">True</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">)</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">
</SPAN><SPAN class="" style="color: #101094; border: 0px; font-weight: inherit; font-size: 13px;">if</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> updateLayer</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">symbologyType </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">==</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"GRADUATED_COLORS"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">:</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">
updateLayer</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">symbology</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">valueField </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">=</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">"PCT_65_OVR"</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">
updateLayer</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">symbology</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">numClasses </SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">=</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"> </SPAN><SPAN class="" style="color: #7d2727; border: 0px; font-weight: inherit; font-size: 13px;">5</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">
mxd</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">.</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">save</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">()
</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;"></SPAN><SPAN class="" style="color: #2b91af; border: 0px; font-weight: inherit; font-size: 13px;">Symbology</SPAN><SPAN class="" style="color: #303336; border: 0px; font-weight: inherit; font-size: 13px;">()</SPAN>
When I execute this code, I get the error ValueError: PCT_65_OVR. I made sure that the attribute name in the code is the same as what is on the symbology layer, so not sure why I am getting this code.
