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Group layers

AlexGole1

Is there a script that allows you to cycle through multiple group layers and turn on and off group layers one by one?
Thanks,
Alex

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JeffreyBarrette

You can iterate through all layers and test for Layer.isGroupLayer. If it returns false, set visible = False.

Jeff

AlexGole1

I tried using the following code to iterate through group layers but it seems like "isGroupLayer" is not an attribute (error message). I am a bit confused about this one. I am just trying to turn on a layer, export it as PDF.l

Thanks,
Alex

import arcpy, os
myPath    = r"K:\Working\Alex_Gole\Try\\"
arcpy.env.workspace = myPath
myMap = arcpy.mapping.MapDocument(myPath + "MyMap.mxd")
layer = arcpy.mapping.ListLayers(myMap)
vislayer = layer.isGroupLayer
df = arcpy.mapping.ListDataFrames(myMap)[0]
# Clear visibility of all layers except for the community areas layer
for lyr in vislayer:
    print "Turning on Layer " + lyr.name
    lyr.visible = True
else:
    print "Turning off layer " + lyr.name
    lyr.visible = False
#Export to PDF
    print "exporting map"
    arcpy.mapping.ExportToPDF(myMap, myPath + str(vislayer.name) + ".pdf")

AlexGole1

import arcpy, os, sys
path = os.path.dirname(sys.argv[0])
mxd = arcpy.mapping.MapDocument(path + r"/MyMap.mxd")
outputPath = r"K:\Working\Alex_Gole\Try"
mapLyr = arcpy.mapping.ListLayers(mxd)[0]

for lyr in mapLyr:
    if lyr.isGroupLayer:
        print "Turning on group Layer " + lyr.name
        lyr.visible = True
    else:
        lyr.visible = False

if os.path.exists(path + "layers.pdf"):
    os.remove(path + "layers.pdf")
arcpy.mapping.ExportToPDF(mxd, os.path.join(outputPath, lyr.name + "layers.pdf"))

I am trying with this script but it does not seem like it returns anything.
Thanks,
Alex

MikeVolz

Can you try removing the

if lyr.isGroupLayer:

and

else:

Then just try printing the lyr.name property to ensure that you are indeed looping through the layers.

AlexGole1

import arcpy, os
myPath = r"K:\Working\Alex_Gole\Try\\"
arcpy.env.workspace = myPath
myMap = arcpy.mapping.MapDocument(myPath + "MyMap.mxd")
layer = arcpy.mapping.ListLayers(myMap)
df = arcpy.mapping.ListDataFrames(myMap)[0]
# Clear visibility of all layers except for the community areas layer
for lyr in layer:
    if lyr.isGroupLayer:
        print "Turning on Layer " + lyr.name
        lyr.visible = True
    else:
        print "Turning off layer " + lyr.name
        lyr.visible = False
#Export to PDF
    print "exporting map"
    arcpy.mapping.ExportToPDF(myMap, myPath + str(lyr.name) + ".pdf")

Seems like this work. My only two worries here is that I dont see my legend being updated automatically and I dont see the name of the group layer as the PDF name when exported.

Can you try removing the

if lyr.isGroupLayer:

and

else:

Then just try printing the lyr.name property to ensure that you are indeed looping through the layers.

JimCousins

Alex,
In your first code entry, you alternate the slash and backslash for the map document concatenation.
For the legend update, you may need to do a refresh on the dataframe to show the changes.
For the myPath variable in your last entry, you have an additional "\" at the end.
Regards,
Jim

MikeVolz

Are you looking to export to pdf while looping thru each layer or are you just trying to do an export to pdf for the group layer?

AlexGole1

Are you looking to export to pdf while looping thru each layer or are you just trying to do an export to pdf for the group layer?

I am looking to export each group layer as a separate PDF.

MikeVolz

Seems to me that you should put the export to pdf statement in the GroupLayer true portion of the if else clause. I would think it is currently exporting every layer out to a pdf since the export to pdf statement is outside the if else clause but within the for loop.

AlexGole1

Seems to me that you should put the export to pdf statement in the GroupLayer true portion of the if else clause. I would think it is currently exporting every layer out to a pdf since the export to pdf statement is outside the if else clause but within the for loop.

You are right. It worked perfectly. Now I dont know if it is easy to do but I am trying to update figure title name and source ffor each PDF using a table. Any idea how to do so?
Thanks,
Alex

import arcpy, os, sys
myPath = os.path.dirname(sys.argv[0])
myMap = arcpy.mapping.MapDocument(myPath + r"/MyMap2.mxd")
layer = arcpy.mapping.ListLayers(myMap, "Map_Elem_Table_v2")[0]
rows = arcpy.SearchCursor(layer)

# Legend Items
fignumElem = arcpy.mapping.ListLayoutElements(myMap, "TEXT_ELEMENT","FigNumber")[0]  
titleElem = arcpy.mapping.ListLayoutElements(myMap, "TEXT_ELEMENT","FigTitle")[0]
sourceElem = arcpy.mapping.ListLayoutElements(myMap, "TEXT_ELEMENT","FigSource")[0]

#create a cursor to access values from attribute table

for row in rows:
    fignumElem.text = str(row.FigNumber)
    titleElem.text = unicode(row.FigTitle)
    sourceElem.text = str(row.FigSource)
    
# Loop through each Group layer and export to PDF

for lyr in layer:
    if lyr.isGroupLayer:
        print "Turning on Layer " + lyr.name
        lyr.visible = True
        print "exporting map"
        arcpy.mapping.ExportToPDF(myMap, myPath + str(lyr.name) + ".pdf")
    else:
        print "Turning off layer " + lyr.name
        lyr.visible = False

MikeVolz

Is Map_Elem_Table_v2 a standalone table or the table associated with the feature class?

If it is a standalone table, I think you need to use the ListTables function to get to the tabular data that you are looking for.

AlexGole1

Is Map_Elem_Table_v2 a standalone table or the table associated with the feature class?

If it is a standalone table, I think you need to use the ListTables function to get to the tabular data that you are looking for.

It is a GDB standalone table. How would I point (link) to this table in my script?

tables = arcpy.ListTables()

# Legend Items
fignumElem = arcpy.mapping.ListLayoutElements(myMap, "TEXT_ELEMENT","FigNumber")[0]  
titleElem = arcpy.mapping.ListLayoutElements(myMap, "TEXT_ELEMENT","FigTitle")[0]
sourceElem = arcpy.mapping.ListLayoutElements(myMap, "TEXT_ELEMENT","FigSource")[0]

#create a cursor to access values from attribute table

for table in tables:
    fignumElem.text = str(row.FigNumber)
    titleElem.text = unicode(row.FigTitle)
    sourceElem.text = str(row.FigSource)

MikeVolz

if it is the only standalone table, I think you could access it with index 0.

if there is more than 1 table, then use an if then statement to trap it by table.name and then get to the specific field you are looking for.

AlexGole1

Sorry, I am using a fc. for the legend fig name and source.

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