install python3-rospkg along with python-rospkg

[k-okada]

Is it possible to install both python-rospkg and python3-rospkg? or do I have to remove python-rospkg to use python3-rospkg ?

k-okada@kokada-t440s:~/catkin_ws/ws_dynamic_reconfigure/src/dynamic_reconfigure/test$ sudo apt-get install python-rospkgReading package lists... Done
Building dependency tree       
Reading state information... Done
python-rospkg is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 51 not upgraded.
k-okada@kokada-t440s:~/catkin_ws/ws_dynamic_reconfigure/src/dynamic_reconfigure/test$ sudo apt-get install python3-rospkg
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  python3-rospkg
0 upgraded, 1 newly installed, 0 to remove and 51 not upgraded.
Need to get 0 B/22.3 kB of archives.
After this operation, 155 kB of additional disk space will be used.
(Reading database ... 350813 files and directories currently installed.)
Preparing to unpack .../python3-rospkg_1.0.31-1_all.deb ...
Unpacking python3-rospkg (1.0.31-1) ...
dpkg: error processing archive /var/cache/apt/archives/python3-rospkg_1.0.31-1_all.deb (--unpack):
 trying to overwrite '/usr/bin/rosversion', which is also in package python-rospkg 1.0.30-1
Errors were encountered while processing:
 /var/cache/apt/archives/python3-rospkg_1.0.31-1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

[wjwwood]

You cannot install them at the same time because they both install the /usr/bin/rosversion file, so you will have to uninstall one in order to install the other.

You can use virtualenv if you need both on your system at the same time.

[k-okada]

Thanks, using virtualenv means I have install python-rospkg from source. Is it correct?

[tfoote]

You can use pip inside the virtualenv, but it is still from source. ​