dgrayctq

Python in Pro: Backing Up All Layers in a Map

Discussion created by dgrayctq on Apr 30, 2020
Latest reply on Apr 30, 2020 by dgrayctq

Hello,

 

I am having a bit of trouble with Python.  I am trying to create a script (hard-coded for now, but eventually soft-coded to make a script tool) that allows the user to back up layers of a given map in ArcGIS Pro by creating local feature classes in a new file geodatabase named with today's date.  Here is my script:


import arcpy

 

# To allow overwriting the outputs change the overwrite option to true.
arcpy.env.overwriteOutput = True

 

# Local variables:
Project = r"P:\Projects\MyProject.aprx"
outPath = r"P:\Projects"
myProj = arcpy.mp.ArcGISProject(Project)
myMap = myProj.listMaps("Map")[0]

 

today = datetime.date.today()
date = today.strftime("%Y%m%d")
name = "Backup_" + str(date) + ".gdb"
arcpy.CreateFileGDB_management(outPath, name)
GDB = outPath + "\\" + name


for layer in myMap.listLayers():  
    # Process: Copy Features
    arcpy.CopyFeatures_management(layer,GDB)

 

My script keeps failing in the Python console, and I get the message: "arcgisscripting.ExecuteError: Failed to execute. Parameters are not valid. ERROR 000840: The value is not a Feature Layer. Failed to execute (CopyFeatures)."

 

My understanding is that listLayers creates a layer object, but to use Copy Features I need a feature layer.  I've tried re-writing the 'for' loop to make a feature layer as follows:

 

for layer in myMap.listLayers(): 
    Feat = arcpy.MakeFeatureLayer_management(layer,"Templayer")
    arcpy.CopyFeatures_management(Feat,GDB)

 

However, I get the same error.

 

My layers are all web-hosted, although I don't know if this is the cause of my problem.  I really want a script that allows me to select a map within ArcGIS Pro, loop through all layers in the map, and copy them into a new FGDB.  How can I get my script to work?  Is there a way to convert a layer object into a feature layer?  Am I using the wrong approach?

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