python-uno : Depends: libreoffice-core (= 1:4.0.2-0ubuntu1)

python-uno : Depends: libreoffice-core (= 1:4.0.2-0ubuntu1)

I have install libreoffice4.1 but when I try to install python-uno It had
error
sudo apt-get install python-uno
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
python-uno : Depends: libreoffice-core (= 1:4.0.2-0ubuntu1) but it is not
going to be installed
E: Unable to correct problems, you have held broken packages.
I don't know how to fix this. Please help. apt-cache policy python-uno
libreoffice-core
python-uno:
Installed: (none)
Candidate: 1:4.0.2-0ubuntu1
Version table:
1:4.0.2-0ubuntu1 0
500 http://mirror.cc.columbia.edu/pub/linux/ubuntu/archive/
raring/universe amd64 Packages
libreoffice-core:
Installed: (none)
Candidate: 1:4.0.2-0ubuntu1
Version table:
1:4.1.0-0ubuntu1~raring1~ppa1 0
100 /var/lib/dpkg/status
1:4.0.2-0ubuntu1 0
500 http://mirror.cc.columbia.edu/pub/linux/ubuntu/archive/
raring/main amd64 Packages