no module named tkinter when installed code example

Example 1: ImportError: No module named _tkinter, please install the python-tk package

sudo apt-get install python-tk

Example 2: ModuleNotFoundError: No module named 'Tkinter'

try:
    # for Python2
    # sudo apt-get install python-tk 
    from Tkinter import *   ## notice capitalized T in Tkinter 
except ImportError:
    # for Python3
    # sudo apt-get install python3-tk 
    from tkinter import *   ## notice lowercase 't' in tkinter here