Can't start IDLE on mac os x high sierra can't import Tkinter

[ceiussandicus at gmail.com]

Hi, I've been trying to get python 3.4.3 (needed for programming course) on my mac, running High Sierra.
I've installed python and activetcl 8.5.18 as per instructions. When I start IDLE from finder it flashes in the dock and disappears. When I start it from terminal, I get the following response: 
** IDLE can't import Tkinter.
Your Python may not be configured for Tk. **
I've googled for the answer but I can't find anything, the closest I got was to this https://github.com/pyinstaller/pyinstaller/issues/2665 but I'm not sure if it is this issue or not.
Can someone help me get started using python?
Cheers
ceiussandicus