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 http://in.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
3.4.0-2ubuntu1 0
500 http://in.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
apt-get clean all
then try again.sudo apt-get clean all