UE_PYTHON_DIR does not work for an external python installation on Linux (Ubuntu 18.04)

Development Pipeline & Plugins Editor Scripting
1

Hi,

Looking at the source, I can see why. The bundled python source directory structure is modified from original . If that is the expected behavior than it would be nice to document it.

It’s assumed that python include files are in UE_PYTHON_DIR/include. That isn’t the case with default python directory structure. The include/python3.7 is the correct directory. A better way is to call python-config --includes to get a list of include directories.

Additionally, it’s assumed similarly for the libpython to be inside the UE_PYTHON_DIR/lib, again that is incorrect. A better way is to call python-config --libs or even better, python-config --ldflags

2

I thought that the Linux support for Unreal python scripting was still missing. When i tried it around 4.20 there were fragments of code, but the net of it was that it didn’t work. Has this changed?

3

Don’t know the official stance however it does work for me with 4.22 on Ubuntu. Barring that it still uses Python 2.7 (which is close to the end of it’s lifeline).