Loading and Unloading Python DLLs

[ianmackers]

I am writing a python script manager that needs to load/unload different python DLLs and virtual environments.

Doing a simple thing like PythonEngine.LoadDLL, UnloadDLL and then again LoadDLL gives me the "'There is already one instance of TPythonEngine running".

The only way I can get this to work is to add the "gPythonEngine := nil" line below into the following procuedure:

procedure TDynamicDll.UnloadDll;
begin
if IsHandleValid then begin
BeforeUnload;
FreeLibrary(FDLLHandle);
FDLLHandle := 0;
gPythonEngine := nil --> Added this line
end;
end;

IS this a bug or am I going about the process incorrectly?

Thanks

[pyscripter]

See Demo34, #287 and https://en.delphipraxis.net/topic/7721-if-i-changed-the-p4d-dllpath-how-to-reload-dlls