Converting Listlayers into a List Using Arcpy. (Arcpro Python3)
How Do I Convert the Lyr Variable into a List? the Variable Type Is Listed as Class 'Arcpy. _Mp. Layer'. Should I Convert This to String Then Insert into List?...
How do I convert the lyr variable into a list? The variable type is listed as class 'arcpy._mp.Layer'. Should I convert this to string then insert into list?
import arcpy
aprx = arcpy.mp.ArcGISProject("./test.aprx")
for m in aprx.listMaps():
for lyr in m.listLayers():
print (lyr)
output
layer1
layer2
layer3
desired output
['layer1', 'layer2', 'layer3']
ex: 2
for m in aprx.listMaps():
for lyr in m.listLayers():
layer = [str(lyr)]
print (layer)
output
['layer1']
['layer2']
['layer3']
This doesn't seem to get into a list either
1 Answer
m.listLayers() already returns a list of Layer objects of type arcpy._mp.Layer. You just need to build a list of layer names. Here's how you can do that:
import arcpy
aprx = arcpy.mp.ArcGISProject("./test.aprx")
map_layers = [] # list of lists where each sublist contains layer names for each map in project
for m in aprx.listMaps():
lyr_names = [] # initialize an empty list and append layer names to it in every iteration
for lyr in m.listLayers():
lyr_names.append(lyr.name)
map_layers.append(lyr_names)
print(map_layers)
So if your Project had 2 maps where each map had 3 layers each, the above snippet would print the result like this:
[['Map 1 Layer 1 Name', 'Map 1 Layer 2 Name', 'Map 1 Layer 3 Name'],
['Map 2 Layer 1 Name', 'Map 2 Layer 2 Name', 'Map 2 Layer 3 Name']]
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