When I run import tkinter I get this error:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.9/tkinter/__init__.py", line 37, in <module>
    import _tkinter # If this fails your Python may not be configured for Tk
ModuleNotFoundError: No module named '_tkinter'
Ruuning apt-get install python3-tk doesn't sove this issue. 
Running Python 3.9 on Debian Experimental
 
    