I'm using GEdit version 3.36.2 pre-installed with Ubuntu 20.04.1.
I wanted to enable the External Tools plugin of GEdit, but I'm unable to do so.
When I click on the External Tools option, I get ⛔ symbol.
When I close GEdit and reopen it, the option is turned off.
If I enable it, I'll again get the same ⛔ symbol.
How do I fix this issue?
Edit 1:
gir1.2-gtksource-3.0
was not installed when I asked this question. After jokerdino's suggestion in the Ask Ubuntu General Room, I installed gir1.2-gtksource-3.0
using this command: sudo apt install gir1.2-gtksource-3.0
.
I noticed an error message after installing gir1.2-gtksource-3.0
.
The plugin "External Tools" could not be loaded
An error occured: Plugin loader "python 3" was not found
I am not sure if I could see this error message before installing gir1.2-gtksource-3.0
. Maybe I didn't place the mouse pointer on the symbol (for few seconds) the first time when I noticed the symbol or maybe it could be some other reason. I don't know.
jokerdino suggested me to open gedit from terminal and check if I got any specific error while turning on External Tools. I did get an error in the terminal.
** (gedit:14693): WARNING **: 20:21:59.976: Error initializing Python Plugin Loader: PyGObject initialization failed
ImportError: could not import gobject (error was: ModuleNotFoundError("No module named 'gi'"))
** (gedit:14693): WARNING **: 20:21:59.976: Please check the installation of all the Python related packages required by libpeas and try again
(gedit:14693): libpeas-WARNING **: 20:21:59.976: Loader 'python3' is not a valid PeasPluginLoader instance
I guess Python 3.8.2 was pre-installed with my Ubuntu installation. I wanted to upgrade to Python 3.8.3. So I followed the instructions mentioned in this website Install Python 3.8.3 in Ubuntu 20.04 LTS – TechPiezo.
At the end of the article, two suggestions were given. First is to replace (or overwrite) already installed version 3.8.2 of Python; second is to install Python v3.8.3 alongside the Python v3.8.2. I followed the first option.
Best Answer
You must and should rollback to default Python version, i.e., 3.8.2 in 20.04 since there are some libraries which are required by some packages installed in the system only for the default version of Python that may not be available or compatible with other versions. Since you've installed Python 3.8.3 from source, the files were copied in
/usr/local/
and/usr/local/bin/python3
is created which a symlink, a.k.a, symbolic link or soft link, of/usr/local/bin/python3.8
.The default value of
PATH
contains/usr/local/bin
before/usr/bin
, thus given priority and the reason behind invoking Python 3.8.3 instead of 3.8.2 wheneverpython3
orpython3.8
is called (since default Python is installed in/usr/bin
).To revert back to the default
python3
won't take much time for you. You have 3 options to revert back.Removing the symlink: Just delete
/usr/local/bin/python3
. Yes that's it.Recreate symlink: You can make
/usr/local/bin/python3
to point to/usr/bin/python3.8
or/usr/bin/python3
(which is already a symlink to/usr/bin/python3.8
as per your message in general room).To recreate symlink, use
ln
withs
andf
options, i.e.,Giving
/usr/bin
priority (overkill): Edit/etc/environment
and place/usr/bin
before/usr/local/bin
.Warning!!! You should handle
/etc/environment
with care. Don't touch or do anything unless you know what you're doing.Alternatively, you can place
PATH="/usr/bin:$PATH"
in/.profile
.Once done, logout and relogin to make changes take place.
Since you've installed Python 3.8.3 from source, you need to delete files manually as Python don't provide
uninstall
option formake
. To delete them run: