Why my Python installed via home brew not include Tkinter

Question

I've installed my Python via homebrew on Mac.

brew install python

and after that I've checked my python version as 2.7.11, then I've tried perform

import Tkinter

I've got following error message:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py", line 39, in <module>
    import _tkinter # If this fails your Python may not be configured for Tk
ImportError: No module named _tkinter

Answer 1

I am running MacOS Big Sur (11.2.3).

With python2, I have Tkinter built-in.

With python3, it has to be installed manually and it's very simple, just run:

$ brew install python-tk

To run python2 in a terminal, execute python file.py.

To run python3 in a terminal, execute python3 file.py.