When I tried to install python3-dev using sudo apt-get install python3-dev I got the following message
python3-dev : Depends: libpython3-dev (= 3.4.0-0ubuntu2) but it is not going to be installed
Depends: python3.4-dev (>= 3.4.0-0~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
So I tried installing dependencies libpython3-dev then I got this message
The following packages have unmet dependencies:
libpython3.4-dev : Depends: libpython3.4-stdlib (= 3.4.0-2ubuntu1.1) but 3.4.3-1ubuntu1~14.04.1 is to be installed
Depends: libpython3.4 (= 3.4.0-2ubuntu1.1) but 3.4.3-1ubuntu1~14.04.1 is to be installed
E: Unable to correct problems, you have held broken packages.
However both the dependencies are already installed.I'm using Ubuntu 14.04
When I ran the apt-cache policy python3.4 I got
python3.4:
Installed: 3.4.3-1ubuntu1~14.04.1
Candidate: 3.4.3-1ubuntu1~14.04.1
Version table:
*** 3.4.3-1ubuntu1~14.04.1 0
100 /var/lib/dpkg/status
3.4.0-2ubuntu1.1 0
500 trusty-updates/main amd64 Packages
500 trusty-security/main amd64 Packages
3.4.0-2ubuntu1 0
500 trusty/main amd64 Packages
2 Answers
The solution is to wait for the Ubuntu developers to re-upload Python 3.4.3 to the updates repository. This should happen any day now. Keep your eyes on bug #1348954.
Edit: Fixed. Installing python3-dev works again.
Okay So I went through this and temporarily solved the problem by forcefully downgrading my python
apt-get install -y \
python3.4=3.4.0-2ubuntu1.1 \
python3.4-minimal=3.4.0-2ubuntu1.1 \
libpython3.4-stdlib=3.4.0-2ubuntu1.1 \
libpython3.4-minimal=3.4.0-2ubuntu1.1
Edit:
After this reinstall stdlib as it misses some libraries.
Removing python3 might remove some packages of your desktop environment reinstall the desktop environment in that case.
I had some issues with lightdm after this. Before removing print the removed packages and reinstall them with new python 3
