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Editorial Team
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Asked: 2026-05-22T12:57:19+00:00

Python 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24) [GCC 4.5.2] on linux2 Type help, copyright,

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Python 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24) 
[GCC 4.5.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import Tkinter
>>>

on the other hand…

Python 3.2 (r32:88445, Mar 25 2011, 19:28:28) 
[GCC 4.5.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import Tkinter
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named Tkinter

I checked synaptic, Tkinter is installed. Then I found this–

If it fails with “No module named _tkinter”, your Python configuration needs to be modified to include this module (which is an extension module implemented in C). Do not edit Modules/Setup (it is out of date). You may have to install Tcl and Tk (when using RPM, install the -devel RPMs as well) and/or edit the setup.py script to point to the right locations where Tcl/Tk is installed. If you install Tcl/Tk in the default locations, simply rerunning “make” should build the _tkinter extension.

I am guessing that tkinter is still associated with the old python in my pc. How do I change that so python3 can use tkinter?

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1 Answer

  1. Editorial Team

    Since you mention synaptic I think you’re on Ubuntu. You probably need to run update-python-modules to update your Tkinter module for Python 3.

    EDIT: Running update-python-modules

    First, make sure you have python-support installed:

    sudo apt-get install python-support

    Then, run update-python-modules with the -a option to rebuild all the modules:

    sudo update-python-modules -a

    I cannot guarantee all your modules will build though, since there are some API changes between Python 2 and Python 3.

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