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I have a python code which iterates through all attribute fields and creates a map for each field automatically. However, in the code I have to specify each attribute manually which was fine so far. Now I have an attribute table with many fields and I need a way to do the same without specifying the attributes manually (as done with "Attrlist" in the code. Any suggestions?

This is the code I am using so far:

outPath = "D:\\Atlas\\test\MxdMaps\\Mxd_MapAutomation\\"   
# list of attributes with the same datatype
attrlist = ["EthnicGroups_totnumberoffarmhh_txt_WNHDeAA01", 
            "EthnicGroups_totnumberoffarmhh_txt_WNHDeAA02",    
            "EthnicGroups_totnumberoffarmhh_txt_WNHDeAA03"]
# layer which has to change the attribute field
featurelayer = arcpy.mapping.ListLayers(mxd, "EthnicGroups_totnroffarmhh")[0]
# text element that has to change (e.g. title...)
title = arcpy.mapping.ListLayoutElements(mxd, "TEXT_ELEMENT", "map_title")[0]
for attr in attrlist:
        #if featurelayer.symbologyType == "GRADUATED_COLORS":
                #print attr
                # change value field
                featurelayer.symbology.valueField = attr
                #featurelayer.symbology.addAllValues()
                featurelayer.symbology.reclassify()
                #print "Break values: %s" % featurelayer.symbology.classBreakValues
                # change tilte
                title.text = attr
                # update view
                arcpy.RefreshActiveView()
                arcpy.RefreshTOC()
                # export as jpeg
                outJPEG = os.path.join(outPath, attr + ".jpg")
                arcpy.mapping.ExportToJPEG(mxd, outJPEG, "PAGE_LAYOUT", 200, 200, 300, False, "24-BIT_TRUE_COLOR", 90, False)
                # export as AdobeIllustrator .ai
                #outAI = os.path.join(outPath, attr +  ".ai")
                #arcpy.mapping.ExportToAI(mxd, outAI, "PAGE_LAYOUT", 200, 200, 300, "BEST", "RGB", "VECTORIZE_BITMAP", False)
del mxd
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    arcpy.ListFields(featurelayer,"*","String") resources.arcgis.com/en/help/main/10.1/index.html#//… will give you all the string fields in a feature class - is that what you're after? – Michael Stimson May 8 '15 at 2:15
  • I think you should accept the answer to your first question and then edit out your second question because it should be researched/asked separately. The desirability of one question per question is mentioned in the Tour. – PolyGeo May 8 '15 at 11:06
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arcpy.ListFields() will give you a list of objects. You just need to get the names from those objects.

field_names = [f.name for f in arcpy.ListFields(lyr)]

Another round about way of getting them would be via a search cursor but that also includes the shape field.

field_names = []
with arcpy.da.SearchCursor(lyr,"*") as cursor:
    field_names = cursor.fields
  • Thanks! I am almost there! Can you also tell me how I would change the code if I wanted to leave out like the first 20 fields and the last 2 fields from the List? – user3476078 May 19 '15 at 2:32
  • field_names[20:len(field_names)-2] – JasonT May 19 '15 at 2:44

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