Remove all layers except one

[DamianMilne]

Hi, I'm making the transition from ArcMap to ArcGIS Pro so please forgive my ignorance...

At the start of my Arcpy script, I am trying to delete all of my layers in my layout except 'Coast'. When I run my script below it crashes ArcGIS Pro. Any advice graciously accepted.

aprx = arcpy.mp.ArcGISProject("CURRENT")
mp = aprx.listMaps("Map")[0]

# Remove all layers except coast
keeplyr = mp.listLayers("Coast")
for rmlyr in mp.listLayers():
 if rmlyr != keeplyr:
 mp.removeLayer(rmlyr)‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[DavidPike · Accepted solution]

it seems like you're trying to find an equality between two layer objects, i'd probably utilise the .name property for evaluation. you've also got a bad indent at the bottom. Might work, might not, I'm not a doctor.

aprx = arcpy.mp.ArcGISProject("CURRENT")
mp = aprx.listMaps("Map")[0]

# Remove all layers except coast

for rmlyr in mp.listLayers():
    if rmlyr.name != "Coast":
        mp.removeLayer(rmlyr)‍‍‍‍‍‍‍‍

[DamianMilne]

Thank you David, turns out the layers I was trying to remove were actually group layers (apologies for omitting that fairly significant detail), however your response did put me on the right track. For the benefit of other newbs like me here is my code snippit.

for rmlyr in mp.listLayers():
 if rmlyr.isGroupLayer:
   mp.removeLayer(rmlyr)‍‍‍‍‍‍