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Accepted
Ram Mandal
Asked: 2018-02-01 00:29:46 +0800 CST

Unable to install python3-tk in my ubuntu machine 16.04

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I am trying to make a very first desktop application using tkinter in pycharm like this.

from tkinter import *

root = Tk()
mLabel = Label(root, text="This is Header")
mLabel.pack
mLabel.mainloop()

But I got an exception saying

ImportError: No module named '_tkinter', please install the python3-tk package

And I tried to install the python3-tk like this

sudo apt-get install python3-tk

But I then got an error about install-info

ronem:::ronem:~$ sudo apt-get install python3-tk
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
libfftw3-single3:i386 libgomp1:i386 libpam-systemd:i386 
libpulsedsp:i386 libtdb1:i386
libwebrtc-audio-processing-0:i386
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
blt tk8.6-blt2.5
Suggested packages:
blt-demo tix python3-tk-dbg
The following NEW packages will be installed:
blt python3-tk tk8.6-blt2.5
0 upgraded, 3 newly installed, 0 to remove and 437 not upgraded.
1 not fully installed or removed.
Need to get 0 B/604 kB of archives.
After this operation, 2,117 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up install-info (6.1.0.dfsg.1-5) ...
/usr/sbin/update-info-dir: 3: /etc/environment: CLASSPATH: not found
dpkg: error processing package install-info (--configure):
subprocess installed post-installation script returned error exit 
status 127
Errors were encountered while processing:
install-info
E: Sub-process /usr/bin/dpkg returned an error code (1)
ronem:::ronem:~$

Please guide me through What I am missing

package-management python3 pycharm tkinter

1 Answers

  1. Best Answer

    Open the terminal and type:

    cat /etc/environment

    Check if there is a line in /etc/environment that contains the string CLASSPATH which doesn't belong in /etc/environment. You should comment out everything from /etc/environment except for the first line (the setting of PATH which starts with PATH=) by preceding each line to be commented out by a # character. Open the /etc/environment file for editing in nano text editor with the following command:

    sudo nano /etc/environment

    Nano editor keyboard shortcuts
    Use the keyboard combination Ctrl + O and after that press Enter to save the file to its current location.
    Use the keyboard combination Ctrl + X to exit nano.

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