Import point cloud from Python without import dialogue

If importing a lidar point cloud via Python, how can we automatically set the color range, and columns without having to manually fill out the import dialogue each time?

import unreal
AssetTools = unreal.AssetToolsHelpers.get_asset_tools()
AssetImportTask = unreal.AssetImportTask()
AssetImportTask.set_editor_property('filename', "d:\test.xyz")
...
AssetTools.import_asset_tasks([AssetImportTask])

Also if we set AssetImportTask.automated = True, then Unreal returns a Python call stack dump. How can we get around that?

LogFactory: FactoryCreateFile: LidarPointCloud with LidarPointCloudFactory (0 0 D:\test.xyz)
LogSlate: Warning: A modal window tried to take control while running in unattended script mode. The window was canceled.
LogStats: FPlatformStackWalk::StackWalkAndDump -  3.189 s
LogOutputDevice: Error: === FDebug::DumpStackTrace(): ===
LogOutputDevice: Error: [Callstack] 0x00007ff997cfb586 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa5a5f1657 UE4Editor-LidarPointCloudEditor.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa5a5f0a35 UE4Editor-LidarPointCloudEditor.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa5a5e015b UE4Editor-LidarPointCloudEditor.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff97b20951c UE4Editor-UnrealEd.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa5a5e6bbd UE4Editor-LidarPointCloudEditor.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9584d73fe UE4Editor-AssetTools.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9584d42f7 UE4Editor-AssetTools.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff95852feaa UE4Editor-AssetTools.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff998340b34 UE4Editor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9985b4753 UE4Editor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94ee84013 UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94eebbe8f UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94eebc97b UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94ee6a2bf UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000006fef4dd3 python27.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000006ffa1fbb python27.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000006ffa1a55 python27.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000006ff9eeab python27.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000006ffa0421 python27.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000006ff9b459 python27.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94ee703c2 UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94eea3113 UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94ee70970 UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94ee7081a UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94ee70736 UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff99ce92780 UE4Editor-Core.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff998505377 UE4Editor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff999e0089a UE4Editor-Engine.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff97b10ed5a UE4Editor-UnrealEd.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff97b94a077 UE4Editor-UnrealEd.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94ee88a9a UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff94ee71521 UE4Editor-PythonScriptPlugin.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997dfab85 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997e01320 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997dda937 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997e7207e UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997e8b27e UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997e02a95 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997cd2dc8 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997d569cf UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997d3f4b2 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff997d32392 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa5a2d7f88 UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa5a2c5c87 UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa5a2da619 UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa5a2c17d0 UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffaf521e6d8 USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffaf521e119 USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa5a2dbb34 UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff796d268c4 UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff796d3ba7c UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff796d3bb5a UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff796d4e31d UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff796d5145a UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffaf4377034 KERNEL32.DLL!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffaf633cec1 ntdll.dll!UnknownFunction []

Thanks.