topic Arcpy ArcGIS Pro Syntax to Determine if a Layer is Visible in the Table of Contents in Python Questions

Arcpy ArcGIS Pro Syntax to Determine if a Layer is Visible in the Table of Contents

Gene_Sipes — Tue, 30 May 2023 18:59:54 GMT

I am trying to write a standalone script for ArcGIS Pro, so that it checks if a layer is visible in the table of contents before running any geo processing functions. I have tried using the following, but it ends up just printing all of the layers in the TOC even if they are turned off, and I get an error stating:

"AttributeError: The attribute 'visible' is not supported on this instance of Layer."

I have tried running it in the Python Window within ArcPro as well, with same result.

# Import ArcPy site-package import arcpy # the open records request Pro Project aprx = arcpy.mp.ArcGISProject( r"\\san_marcos\arcfile\Department Projects and File Geodatabases\Public Services\Transportation\GSipes\ProProjects\OpenRecordsRequests\OpenRecordsRequests.aprx") # list of layers in the project myMap = aprx.listMaps()[0] for layer in myMap.listLayers(): if layer.supports("VISIBLE") == True: if layer.visible == True: print(layer.name) print('I am done listing layers')

Re: Arcpy ArcGIS Pro Syntax to Determine if a Layer is Visible in the Table of Contents

DavidPike — Tue, 30 May 2023 19:22:39 GMT

.supports is a bit flakey I think.

# Import ArcPy site-package import arcpy # the open records request Pro Project aprx = arcpy.mp.ArcGISProject( r"\\san_marcos\arcfile\Department Projects and File Geodatabases\Public Services\Transportation\GSipes\ProProjects\OpenRecordsRequests\OpenRecordsRequests.aprx") # list of layers in the project myMap = aprx.listMaps()[0] for layer in myMap.listLayers(): try: if layer.visible: print(layer.name) except: pass print('I am done listing layers')

Re: Arcpy ArcGIS Pro Syntax to Determine if a Layer is Visible in the Table of Contents

Gene_Sipes — Tue, 30 May 2023 19:15:38 GMT

Thanks... well that kind of worked. It at least only prints out the name of the layers that are visible, but I still get a nasty little error.

Traceback (most recent call last):
File "c:\Program Files\ArcGIS\Pro\Resources\ArcPy\arcpy\arcobjects\_base.py", line 90, in _get
return convertArcObjectToPythonObject(getattr(self._arc_object, attr_name))
AttributeError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "\\san_marcos\files\DeptShares\Public Services\Transportation\GIS\Scripts\Python\OpenRecordsRequestReWrite.py", line 15, in <module>
if layer.visible:
File "c:\Program Files\ArcGIS\Pro\Resources\ArcPy\arcpy\arcobjects\_base.py", line 93, in _get
raise AttributeError(
AttributeError: The attribute 'visible' is not supported on this instance of Layer.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "\\san_marcos\files\DeptShares\Public Services\Transportation\GIS\Scripts\Python\OpenRecordsRequestReWrite.py", line 18, in <module>
print("error - " + layer.name)
File "c:\Program Files\ArcGIS\Pro\Resources\ArcPy\arcpy\arcobjects\_base.py", line 93, in _get
raise AttributeError(
AttributeError: The attribute 'name' is not supported on this instance of Layer.

Re: Arcpy ArcGIS Pro Syntax to Determine if a Layer is Visible in the Table of Contents

DavidPike — Tue, 30 May 2023 19:24:03 GMT

ah ok, I'll just pass it. A bit hacky but if it's not production code and it works.. Have edited the previous code above.

Re: Arcpy ArcGIS Pro Syntax to Determine if a Layer is Visible in the Table of Contents

Gene_Sipes — Wed, 31 May 2023 14:21:31 GMT

I really can't understand why my second print statement never runs. I am slowly building out my code to step along the way. Here I create a feature layer and select records from it that intersect my selecting polygon, but the last print statement: print('just finished selecting features within clip feature'), never runs. Here is the output from the code below:

about to evaluate if layer.visible is true
about to evaluate if layer.visible is true
about to evaluate if layer.visible is true
Layer Centerline is visible.
about to evaluate if layer.visible is true
about to evaluate if layer.visible is true
about to evaluate if layer.visible is true
about to evaluate if layer.visible is true
I am done clipping layers to AOI

import arcpy import os # the open records request Pro Project aprx = arcpy.mp.ArcGISProject( r"\\san_marcos\arcfile\Department Projects and File Geodatabases\Public Services\Transportation\GSipes\ProProjects\OpenRecordsRequests\OpenRecordsRequests.aprx") # list of layers in the project myMap = aprx.listMaps()[0] # Set the clip featureclass clipFeatures = r"\\san_marcos\arcfile\Department Projects and File Geodatabases\Public Services\Transportation\GSipes\ProProjects\OpenRecordsRequests\OpenRecordsRequests.gdb\SelectionPoly" # Set the directory path where the clipped shapefiles will be stored path = r"C:\Users\sipes_gene\Documents\OpenRecords" # script will ask user to enter new folder name, folder will be place in path outFolder = input('Enter your folder name :') # join the path to the new folder name outWorkspace = os.path.join(path, outFolder) # Set the XY tolerance of the clip function clusterTolerance = .000378 # create the directory os.mkdir(outWorkspace) for layer in myMap.listLayers(): try: print('about to evaluate if layer.visible is true') if layer.visible: print('Layer {} is visible.'.format(layer)) featureClassName = arcpy.ValidateTableName(layer, outWorkspace) outFeatureClass = os.path.join(outWorkspace, featureClassName) arcpy.MakeFeatureLayer_management(layer, layer) arcpy.SelectLayerByLocation_management( layer, "within", clipFeatures) print('just finished selecting features within clip feature') except: pass print('I am done clipping layers to AOI')

Re: Arcpy ArcGIS Pro Syntax to Determine if a Layer is Visible in the Table of Contents

Gene_Sipes — Wed, 31 May 2023 14:33:23 GMT

Ok, made some progress, using {layer} as both the input and output of MakeFeatureLayer seems to be the problem.

Re: Arcpy ArcGIS Pro Syntax to Determine if a Layer is Visible in the Table of Contents

Gene_Sipes — Wed, 31 May 2023 15:01:43 GMT

Alright, got it to work! Edge (ChatGPT) is awesome. Here is my final code, just because. I also realize there is a tool called Extract Data that can accomplish the same thing, but this was more of a python challenge for me than anything. Cheers.

# Import ArcPy site-package and os modules import arcpy import os # the open records request Pro Project aprx = arcpy.mp.ArcGISProject( r"\\san_marcos\arcfile\Department Projects and File Geodatabases\Public Services\Transportation\GSipes\ProProjects\OpenRecordsRequests\OpenRecordsRequests.aprx") # list of layers in the project myMap = aprx.listMaps()[0] # Set the clip featureclass clipFeatures = r"\\san_marcos\arcfile\Department Projects and File Geodatabases\Public Services\Transportation\GSipes\ProProjects\OpenRecordsRequests\OpenRecordsRequests.gdb\SelectionPoly" # Set the directory path where the clipped shapefiles will be stored path = r"C:\Users\sipes_gene\Documents\OpenRecords" # script will ask user to enter new folder name, folder will be place in path outFolder = input('Enter your folder name :') # join the path to the new folder name outWorkspace = os.path.join(path, outFolder) # Set the XY tolerance of the clip function clusterTolerance = .000378 # create the directory os.mkdir(outWorkspace) for layer in myMap.listLayers(): try: # check if layer is visible in TOC, if true evaluate against selection polygon if layer.visible: print('Layer {} is visible.'.format(layer)) # validate feature class names featureClassName = arcpy.ValidateTableName(layer, outWorkspace) outFeatureClass = os.path.join(outWorkspace, featureClassName) # create a feature layer from layer on disk featureLayer = arcpy.MakeFeatureLayer_management( layer, "{}_fl".format(layer)) # evaluate feature layer against selecting polygon selectedFeatureLayer = arcpy.SelectLayerByLocation_management( featureLayer, "intersect", clipFeatures) # get count of selected features for print statement count = int(arcpy.GetCount_management(selectedFeatureLayer)[0]) if count == 0: print("%s features do not exist within AOI" % layer) else: # Clip each feature class in the list with the clip feature class. # looks for clip feature so as not to clip it. if selectedFeatureLayer != os.path.basename(clipFeatures): arcpy.Clip_analysis( selectedFeatureLayer, clipFeatures, outFeatureClass, clusterTolerance) print("{} {} features clipped to AOI".format(count, layer)) print("All is well in the Universe, good bye") except Exception as e: print(f"An error occurred: {e}") print('I am done clipping layers to AOI')