Difference between tkinter and Tkinter

Tkinter is Python 2.x’s name for the Tkinter library. In Python 3.x however, the name was changed to tkinter. To avoid running into this problem, I usually do this:

from sys import version_info
if version_info.major == 2:
    # We are using Python 2.x
    import Tkinter as tk
elif version_info.major == 3:
    # We are using Python 3.x
    import tkinter as tk

It’s simply that in Python 3 it’s “tkinter” and in Python 2 it’s “Tkinter”
case in point:

#python 2
from Tkinter import *

#python 3
from tkinter import *

To make program run both on Python 2 and Python 3 you can use:

try:
    import tkinter as tk
except:
    import Tkinter as tk

and then use Tkinter module as tk

Python 2 has always used from Tkinter import *
but python 3 uses from tkinter import *
I find this stupid and unfortunately it is confusing a lot of people.

The capitalization of Tkinter and tkinter widget, method and option names is significantly different across the board. In some cases, the names themselves are different. Some features of Tkinter do not exist in tkinter, and vice-versa. But, as already stated, the main difference is that Tkinter is a module in Python 2x while tkinter is a module in Python 3x.

The only difference is the module name that depends on the major version of Python. While in Python 3 it is tkinter, it used to be Tkinter in Python 2. Keep in mind, that other modules related to Tkinter were renamed as well. Here is the full list.

From the docs:

Tkinter has been renamed to tkinter in Python 3.

For backward compatibility, it’s a good idea to import tkinter and the related modules you’re using like this:

try:
    import tkinter as tk
    from tkinter import messagebox
    from tkinter import filedialog
except ImportError:
    import Tkinter as tk
    import tkMessageBox as messagebox
    import tkFileDialog as filedialog

try:
   import tkinter
   print"importing tkinter from python 3.x"
except:
   import Tkinter
   print"importing Tkinter from python 2.x"

finally:
   print"Difference !"

According to the official documentation, “Tkinter has been renamed to tkinter in Python 3”. In Python2 you use import Tkinter or more often from Tkinter import * where “*” means “all”. In Python3 you use import tkinter or from tkinter import *.

Python2:

from Tkinter import *

Python3:

from tkinter import *

In python 2, it is:

from Tkinter import *

In python 3, it is:

from tkinter import *

And if you want to make your code work in both versions, do:

try:
    from Tkinter import *
except:
    from tkinter import *

Additional Difference Between Tkinter and tkinter for Python 2. & Python 3.**

I had a script which had different imports of Python 2.* Tkinter so browsing a but I see that the answer are all scattered. Here a small summary with a safe Script for using both Python versions.

try:
    import Tkinter as tk
    import tkMessageBox as tkm
    import ScrolledText as tkst
    from tkFileDialog import askopenfilename
except ImportError:
    import tkinter as tk
    import tkinter.messagebox as tkm
    import tkinter.scrolledtext as tkst
    from tkinter.filedialog import askopenfilename

List of ModuleNotFoundError Errors (When Running Python 3.)

ModuleNotFoundError: No module named 'Tkinter'
ModuleNotFoundError: No module named 'tkMessageBox'
ModuleNotFoundError: No module named 'ScrolledText'
ModuleNotFoundError: No module named 'tkFileDialog'

for python 2:

from Tkinter import *

For python 3:

from tkinter import * 

Else, try:

try:
    from Tkinter import *
except ImportError:
    from tkinter import *