Create Level

aloivu · February 8, 2019, 3:30pm

How to create Level with Python Code? Thanks alot

CFMS_Bristol · February 11, 2019, 11:11am

Simple example:

levelName = ‘test1’
levelLibrary = unreal.EditorLevelLibrary()
success = levelLibrary.new_level(’/Game/Levels/{}’.format(levelName))

aloivu · February 14, 2019, 8:46am

Thanks alot. It works very good. Doy you know how can i load this level if i am in another level? Is there tutorial for python with script?

aloivu · February 14, 2019, 8:53am

thanks alot i ot it:
import unreal
levelName = ‘test1’
levelLibrary = unreal.EditorLevelLibrary()
success = levelLibrary.load_level(’/Game/Levels/{}’.format(levelName))

anonymous_user_1d736ae51 · March 23, 2019, 8:57pm

hi! did you try to load then another level (f.e. several selected levels in CB in a loop). In my case - i’m experiencing constant crashes on loading the second item. The first level loads successfully, but the second attempt - crashes…

Jamie_Dale · March 26, 2019, 7:13pm

load_level is a class method, so you don’t need to create an instance to call it and can just do unreal.EditorLevelLibrary.load_level(…)

What does your log say the crash is? I fixed something for 4.22 where Python references to objects in a sub-level weren’t being cleared when switching worlds, which caused a fatal GC validation error.

anonymous_user_1d736ae51 · March 27, 2019, 10:14pm

Hello, I’m using 4.21. For first maps selection all works well, but if you try then run this script on another set of maps - then engine crashes.



import unreal  
## selecting levels from CB
@unreal.uclass()
class MyEditorUtility(unreal.GlobalEditorUtilityBase):
      pass  

editor_util = MyEditorUtility()
evels = editor_util.get_selected_assets()

for level in levels:
      level_path_name = level.get_path_name().split(':')[0].split('.')[0]
      unreal.EditorLevelLibrary.load_level(level.get_path_name())
      unreal.EditorLoadingAndSavingUtils.save_map(level.get_world(), level_path_name)

And here is log.

Access violation - code c0000005 (first/second chance not available)

UE4Editor_CoreUObject!UClass::GetDefaultObject() [d:\build++ue4\sync\engine\source\runtime\coreuobject\public\uobject\class.h:2435]
UE4Editor_HotReload!FHotReloadClassReinstancer::SetupNewClassReinstancing() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:21]
UE4Editor_HotReload!FHotReloadClassReinstancer::FHotReloadClassReinstancer() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:308]
UE4Editor_HotReload!FHotReloadClassReinstancer::Create() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.h:120]
UE4Editor_HotReload!FHotReloadModule::ReinstanceClass() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreload.cpp:1255]
UE4Editor_HotReload!FHotReloadModule::ReinstanceClasses() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreload.cpp:1242]
UE4Editor_HotReload!TBaseRawMethodDelegateInstance<0,FHotReloadModule,void __cdecl(void)>::ExecuteIfSafe() [d:\build++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:518]
UE4Editor_PythonScriptPlugin!FPyWrapperTypeReinstancer::ProcessPending() [d:\build++ue4\sync\engine\plugins\experimental\pythonscriptplugin\source\pythonscriptplugin\private\pywrappertyperegistry.cpp:375]
UE4Editor_PythonScriptPlugin!FPythonScriptPlugin::RunFile() [d:\build++ue4\sync\engine\plugins\experimental\pythonscriptplugin\source\pythonscriptplugin\private\pythonscriptplugin.cpp:874]
UE4Editor_PythonScriptPlugin!FPythonScriptPlugin::HandlePythonExecCommand() [d:\build++ue4\sync\engine\plugins\experimental\pythonscriptplugin\source\pythonscriptplugin\private\pythonscriptplugin.cpp:736]
UE4Editor_PythonScriptPlugin!FPythonScriptPlugin::Exec() [d:\build++ue4\sync\engine\plugins\experimental\pythonscriptplugin\source\pythonscriptplugin\private\pythonscriptplugin.cpp:413]
UE4Editor_Core!FSelfRegisteringExec::StaticExec() [d:\build++ue4\sync\engine\source\runtime\core\private\misc\coremisc.cpp:55]
UE4Editor_CoreUObject!StaticExec() [d:\build++ue4\sync\engine\source\runtime\coreuobject\private\uobject\obj.cpp:4161]
UE4Editor_Engine!UEngine::Exec() [d:\build++ue4\sync\engine\source\runtime\engine\private\unrealengine.cpp:3619]
UE4Editor_UnrealEd!UEditorEngine::Exec() [d:\build++ue4\sync\engine\source\editor\unrealed\private\editorserver.cpp:5715]
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() [d:\build++ue4\sync\engine\source\editor\unrealed\private\unrealedsrv.cpp:691]
UE4Editor_UnrealEd!FConsoleCommandExecutor::Exec() [d:\build++ue4\sync\engine\source\editor\unrealed\private oolkits\fconsolecommandexecutor.cpp:118]
UE4Editor_OutputLog!SConsoleInputBox::OnTextCommitted() [d:\build++ue4\sync\engine\source\developer\outputlog\private\soutputlog.cpp:278]
UE4Editor_OutputLog!TBaseSPMethodDelegateInstance<0,SConsoleInputBox,0,void __cdecl(FText const & __ptr64,enum ETextCommit::Type)>::ExecuteIfSafe() [d:\build++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:355]
UE4Editor_Slate!SMultiLineEditableText::OnTextCommitted() [d:\build++ue4\sync\engine\source\runtime\slate\private\widgets ext\smultilineeditabletext.cpp:371]
UE4Editor_Slate!FSlateEditableTextLayout::HandleCarriageReturn() [d:\build++ue4\sync\engine\source\runtime\slate\private\widgets ext\slateeditabletextlayout.cpp:1455]
UE4Editor_Slate!FSlateEditableTextLayout::HandleKeyDown() [d:\build++ue4\sync\engine\source\runtime\slate\private\widgets ext\slateeditabletextlayout.cpp:928]
UE4Editor_Slate!SMultiLineEditableText::OnKeyDown() [d:\build++ue4\sync\engine\source\runtime\slate\private\widgets ext\smultilineeditabletext.cpp:607]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FKeyEvent,<lambda_2afcd964c763e269e2d1a63f3a72f846> >() [d:\build++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:270]
UE4Editor_Slate!FSlateApplication::ProcessKeyDownEvent() [d:\build++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5097]
UE4Editor_Slate!FSlateApplication::OnKeyDown() [d:\build++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5009]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1666]
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:2281]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:929]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:766]
user32
user32
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsplatformapplicationmisc.cpp:130]
UE4Editor!FEngineLoop::Tick() [d:\build++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3615]
UE4Editor!GuardedMain() [d:\build++ue4\sync\engine\source\runtime\launch\private\launch.cpp:174]
UE4Editor!GuardedMainWrapper() [d:\build++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:145]
UE4Editor!WinMain() [d:\build++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:276]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283]
kernel32
ntdll

Jamie_Dale · March 27, 2019, 11:37pm

@Wizard3d Ah, it’s crashing creating the CDO for your MyEditorUtility class the second time around.

I’m not at my desk to test, so this may make no difference, but does this change help at all?


# before
editor_util = MyEditorUtility()
levels = editor_util.get_selected_assets()

# after
levels = MyEditorUtility.get_default_object().get_selected_assets()

anonymous_user_1d736ae51 · March 28, 2019, 9:03am

Jamie_Dale:

@anonymous_user_1d736ae51 Ah, it’s crashing creating the CDO for your MyEditorUtility class the second time around.

I’m not at my desk to test, so this may make no difference, but does this change help at all?
# before
editor_util = MyEditorUtility()
levels = editor_util.get_selected_assets()

# after
levels = MyEditorUtility.get_default_object().get_selected_assets()

@**Jamie Dale **The crash is still occurs on second set of maps

Access violation - code c0000005 (first/second chance not available)

UE4Editor_CoreUObject!UClass::GetDefaultObject() [d:\build++ue4\sync\engine\source\runtime\coreuobject\public\uobject\class.h:2435]
UE4Editor_HotReload!FHotReloadClassReinstancer::SetupNewClassReinstancing() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:21]
UE4Editor_HotReload!FHotReloadClassReinstancer::FHotReloadClassReinstancer() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.cpp:308]
UE4Editor_HotReload!FHotReloadClassReinstancer::Create() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreloadclassreinstancer.h:120]
UE4Editor_HotReload!FHotReloadModule::ReinstanceClass() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreload.cpp:1255]
UE4Editor_HotReload!FHotReloadModule::ReinstanceClasses() [d:\build++ue4\sync\engine\source\developer\hotreload\private\hotreload.cpp:1242]
UE4Editor_HotReload!TBaseRawMethodDelegateInstance<0,FHotReloadModule,void __cdecl(void)>::ExecuteIfSafe() [d:\build++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:518]
UE4Editor_PythonScriptPlugin!FPyWrapperTypeReinstancer::ProcessPending() [d:\build++ue4\sync\engine\plugins\experimental\pythonscriptplugin\source\pythonscriptplugin\private\pywrappertyperegistry.cpp:375]
UE4Editor_PythonScriptPlugin!FPythonScriptPlugin::RunFile() [d:\build++ue4\sync\engine\plugins\experimental\pythonscriptplugin\source\pythonscriptplugin\private\pythonscriptplugin.cpp:874]
UE4Editor_PythonScriptPlugin!FPythonScriptPlugin::HandlePythonExecCommand() [d:\build++ue4\sync\engine\plugins\experimental\pythonscriptplugin\source\pythonscriptplugin\private\pythonscriptplugin.cpp:736]
UE4Editor_PythonScriptPlugin!FPythonScriptPlugin::Exec() [d:\build++ue4\sync\engine\plugins\experimental\pythonscriptplugin\source\pythonscriptplugin\private\pythonscriptplugin.cpp:413]
UE4Editor_Core!FSelfRegisteringExec::StaticExec() [d:\build++ue4\sync\engine\source\runtime\core\private\misc\coremisc.cpp:55]
UE4Editor_CoreUObject!StaticExec() [d:\build++ue4\sync\engine\source\runtime\coreuobject\private\uobject\obj.cpp:4161]
UE4Editor_Engine!UEngine::Exec() [d:\build++ue4\sync\engine\source\runtime\engine\private\unrealengine.cpp:3619]
UE4Editor_UnrealEd!UEditorEngine::Exec() [d:\build++ue4\sync\engine\source\editor\unrealed\private\editorserver.cpp:5715]
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() [d:\build++ue4\sync\engine\source\editor\unrealed\private\unrealedsrv.cpp:691]
UE4Editor_UnrealEd!FConsoleCommandExecutor::Exec() [d:\build++ue4\sync\engine\source\editor\unrealed\private oolkits\fconsolecommandexecutor.cpp:118]
UE4Editor_OutputLog!SConsoleInputBox::OnTextCommitted() [d:\build++ue4\sync\engine\source\developer\outputlog\private\soutputlog.cpp:278]
UE4Editor_OutputLog!TBaseSPMethodDelegateInstance<0,SConsoleInputBox,0,void __cdecl(FText const & __ptr64,enum ETextCommit::Type)>::ExecuteIfSafe() [d:\build++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:355]
UE4Editor_Slate!SMultiLineEditableText::OnTextCommitted() [d:\build++ue4\sync\engine\source\runtime\slate\private\widgets ext\smultilineeditabletext.cpp:371]
UE4Editor_Slate!FSlateEditableTextLayout::HandleCarriageReturn() [d:\build++ue4\sync\engine\source\runtime\slate\private\widgets ext\slateeditabletextlayout.cpp:1455]
UE4Editor_Slate!FSlateEditableTextLayout::HandleKeyDown() [d:\build++ue4\sync\engine\source\runtime\slate\private\widgets ext\slateeditabletextlayout.cpp:928]
UE4Editor_Slate!SMultiLineEditableText::OnKeyDown() [d:\build++ue4\sync\engine\source\runtime\slate\private\widgets ext\smultilineeditabletext.cpp:607]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FKeyEvent,<lambda_2afcd964c763e269e2d1a63f3a72f846> >() [d:\build++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:270]
UE4Editor_Slate!FSlateApplication::ProcessKeyDownEvent() [d:\build++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5097]
UE4Editor_Slate!FSlateApplication::OnKeyDown() [d:\build++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5009]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1666]
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:2281]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:929]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:766]
user32
user32
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [d:\build++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsplatformapplicationmisc.cpp:130]
UE4Editor!FEngineLoop::Tick() [d:\build++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3615]
UE4Editor!GuardedMain() [d:\build++ue4\sync\engine\source\runtime\launch\private\launch.cpp:174]
UE4Editor!GuardedMainWrapper() [d:\build++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:145]
UE4Editor!WinMain() [d:\build++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:276]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283]
kernel32
ntdll

anonymous_user_1d736ae51 · March 28, 2019, 9:19am

there is


unreal.GlobalEditorUtilityBase.get_selected_assets()

isn’t it supposed to Get from CB? and what arg it awaits, there isn’t anything in docs.

LogPython: Error: levels = unreal.GlobalEditorUtilityBase.get_selected_assets()
LogPython: Error: TypeError: descriptor ‘get_selected_assets’ of ‘GlobalEditorUtilityBase’ object needs an argument

Jamie_Dale · March 28, 2019, 3:58pm

It’s not a class method, so it needs to be called on an instance, not the type itself.

Your crash also seems to be fixed in 4.22.

anonymous_user_1d736ae51 · March 28, 2019, 6:04pm

Ok, thanks, it’s good to know. It’s left to wait for plugins to catch up with UE version