https://github.com/eoyilmaz/displaycal-py3/issues/606
--- a/DisplayCAL/display_cal.py
+++ b/DisplayCAL/display_cal.py
@@ -151,6 +151,7 @@
     TextType,
     XYZType,
     VideoCardGammaType,
+    VideoCardGammaTableType,
 )
 from DisplayCAL.log import log, logbuffer
 from DisplayCAL.meta import (