rosdep installation via pip behind proxy
$ sudo pip install -U rosdep
Cannot fetch index base URL https://pypi.python.org/simple/ Could not find any downloads that satisfy the requirement rosdep in /usr/lib/python2.7/dist-packages Downloading/unpacking rosdep Cleaning up... No distributions at all found for rosdep in /usr/lib/python2.7/dist-packages Storing debug log for failure in /home/sabyasachi/.pip/pip.log