This problem has been reported earlier but I couldn't find the exact solution for it. I installed ActiveTCL and downloaded tktable.py by  "Guilherme Polo <ggpolo@gmail.com>" to my site-packages, also added Tktable.dll, pkgindex.tcl, and tktable.tcl from ActiveTCL\lib\Tktable2.11 to my python38-32\tcl and dlls . I also tried setting the env variable for TCL_LIBRARY and TK_LIBRARY to tcl8.6 and tk8.6 respectively. But I am still getting invalid command name "table".
What is that I am missing? Those who made tktable work on windows 10 and python 3 , how did you do it? I am out of ideas and would be grateful for some tips on it.
Seems like there was problem running the Tktable dlls in python38-32 bit version. It worked in 64 bit version. 
Thanks @Donal Fellows for your input.
Tktable module installation problem. _tkinter.TclError: invalid command name "table"