Resolve "Update: Support for Python3 only"

Closes #21 (closed)

CMakeLists.txt

@@ -255,8 +255,12 @@ SET(OV_COMPILE_TESTS "true")
 # Skip building documentation
 SET(SKIP_DOCUMENTATION "1")
 
-# Python plugin sometimes causes problems; use the following to disable it
-#SET(SKIP_CONTRIB_PLUGINS_PROCESSING_PYTHON "1")
+# Only build the python plugin for one version of python.
+# On windows, it can work with both, with the right configuration.
+# On linux, compilation is easier, but runtime is not possible with both versions. Python.h is not namespaced and
+# both plugins end up using the same Python API version (e.g. Python3 plugin calling python2 API).
+SET(SKIP_CONTRIB_PLUGINS_PROCESSING_PYTHON2 "1")
+#SET(SKIP_CONTRIB_PLUGINS_PROCESSING_PYTHON3 "1")
 
 # Skipping demos can speed up compilation a lot, if you don't need them
 #SET(SKIP_APPLICATIONS_DEMOS "1")