Running rosmaster gives the following error message: Traceback (most recent call last): File "/usr/lib/python-exec/python2.7/roscore", line 36, in <module> from rosmaster.master_api import NUM_WORKERS File "/usr/lib64/python2.7/site-packages/rosmaster/__init__.py", line 35, in <module> from .main import rosmaster_main File "/usr/lib64/python2.7/site-packages/rosmaster/main.py", line 43, in <module> import rosmaster.master File "/usr/lib64/python2.7/site-packages/rosmaster/master.py", line 47, in <module> import rosmaster.master_api File "/usr/lib64/python2.7/site-packages/rosmaster/master_api.py", line 72, in <module> from rosmaster.util import xmlrpcapi File "/usr/lib64/python2.7/site-packages/rosmaster/util.py", line 48, in <module> from defusedxml.xmlrpc import monkey_patch ImportError: No module named defusedxml.xmlrpc Since 1.12.1 rosmaster depends on defusedxml (dev-python/defusedxml): https://github.com/ros/ros_comm/commit/d727416e243b0ae0757754d540648f01b13d990a
commit 555da6ef7b69ec809ea65f0e153430c2a1a50191 Author: Alexis Ballier <aballier@gentoo.org> Date: Fri Apr 22 16:29:23 2016 +0200 dev-ros/rosmaster: add missing dev-python/defusedxml dep, bug #580836 Package-Manager: portage-2.2.28 thx!